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http://www.ominous-valve.com/acronyms.txt

       

Radio Acronyms 4000+ (Always under construction) By Hugh Stegman NV6H

At end of file: Police/CB 10-codes Other police codes Computer networking standards [~] = not an acronym, just looks like one

Radiospeak, techspeak, milspeak, NASAspeak, and compuspeak all developed for spoken, sent, or stored brevity. As Larry Van Horn is always noting, acronyms and abbreviations don't always save all that much space in written text. Utility World tries to slog through all the alphabet soup and write in good old English. Sometimes we fail.

Decode our lapses thusly:

Acronym Definition // Parallel transmission (simulcast) on -/// Cloud layer below observing station +FC Tornado on the ground 1 LT first lieutenant 16-DPSK 16-Phase Differential Phase-Shift Keying 16P4A 16 phase, 4 amplitudes 2 LT second lieutenant 220SMA 220 (MHz) Spectrum Management Assn (Amateur) 2600 (1)2600 Hz, audio frequency used for US telephone idle tones 2600 (2)Hack/Phreak magazine, named in honor of above 2600 (3)Use of tone-spoofing equipment to control phone switches; now a good way to get caught phreaking and go to jail 2G ALE Second generation automatic link establishment 32BDA 32-Bit Disk Access (Windoze) 3D Three dimensional (like some weather models) 3F Three-figure code groups (mixed or all numbers) 3FG Three-figure code groups 3G ALE Third generation automatic link establishment 3G Third Generation 3GPP Third Generation Partnership Project 3G-TM Third Generation Traffic Management Protocol 3L Three-letter code groups 3LG Three-letter code groups 4F Four figure code groups (mixed or all numbers) 4FG Four figure code groups 4L Four-letter code groups 4LG Four-letter code groups 5 by 5 (1) Signal report: readability 5, strength 5 5 by 5 (2) Signal report: you are loud and clear 5D Demand Driven Direct Digital Dissemination 5F Five-figure code groups (mixed or all numbers) 5FG Five-figure code groups 5L Five-letter code groups 5LG Five-letter code groups 73 Old telegraphy slang: "Best regards" 81-81 Strange Russian teleprinting system, popular in Cuba 88 Old telegraphy slang: "Love and kisses" 89/336/EEC European electromagnetic compatibility directive 8-DPSK 8-Phase Differential Phase-Shift Keying 8P2A 8 phase, 2 amplitudes A Index 24-hour magnetic activity index, lower=better A (1)Altimeter setting A (2)Old "A" battery, for portable radio tube filaments A&P Airframe & Powerplant, U.S. aircraft mechanic certificate a/c Aircraft A/D Analog to digital converter A/G Air to ground A0 AM carrier with no modulation, now N0N A1 (Alpha-1) Aircraft maintenance status: no writeups; plane OK A1A Morse telegraphy for aural copy, i.e. "CW" A2 (Alpha-2) Status: write up non-mission-cr itical system A2A Modulated CW telegraphy for aural copy, i.e. "MCW" A3 (Alpha-3) Status: write up critical system; mission aborted A3E AM voice or broadcasting AA CW prosign: "[repeat] all after" AAA Anti-Aircraft Artillery AAAS American Association for the Advancement of Science AAB Automatic Answer-Back (RTTY) AABCP Advanced airborne command post AACC AADC AAF AAF AAFES AAIC AAL AAL-1 AAL-2 AAL-3/4 AAL-5 AALC AALC AAM AAMDS AAMSS AAR AAR AAR AAR AARS AASS AATO AAV AAVP AAW AB AB ABA ABC ABC

Airborne Air Command Center Area Air Defense Commander (1)Auxiliary Airfield (2)Army Air Forces, obsolete Army and Air Force Exchange Service Accounting Authority Identification Code ATM Adaptation Layer Synchronous adaptation layer designed for carrying voice trunk lines Adaptation layer intended for variable bit rate video, but never really got off the ground and is not offered by vendors Adaptation layer intended to be used by Frame Relay and SMDS and other delay-insensitive variable rate or bursty data traffic, but mostly now 'Simple and efficient adaptation layer' for computer networking (1)Amphibious Assault Landing Craft (2)Amplified automatic level control Air to Air Missile Automated Air Movement Data System Arinc Aeronautical Mobile Satellite Service (proposed; would replace much of MWARA) (1)Air to Air Refueling (2)After-Actio n Review (3)Automatic Alternate Rerouting (4)Assn. of American Railroads Army Amateur Radio System, started 1925, now part of MARS Advanced Air Surveillance Radar Automated Air Tasking Order Assault Amphibious Vehicle Advanced Aircrew Vision Protection Anti-Air Warfare (1)Air Base (2)CW prosign: "[repeat] all before" Australian Broadcasting Authority (1)Atomic, Biological, Chemical (warfare) (2)American Broadcasting Company

ABC ABCA ABCC ABCCC ABCS ABD ABIS ABITS ABL ABM

(3) Australian Broadcasting American, British, Canadian, Corporation Australian Airborne battlefield command and control center Airborne Command Control Center Army Battle Command System Air Base Defense Advanced Battlespace Information System Airborne Imagery Transmission System Airborne Laser Anti-Ballistic Missile

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ABN Airborne ABNCP Airborne National Command Post ABO Annular Beam Oscillator ABOR Abort ABU Asia Broadcast Union AC (1)Alternating Current AC (2)Active Components (US Army) AC (3)Acquisition Center AC&I Acquisition, Construction & Improvement ACA (1)Airspace control authority ACA (2)Australian Communications Authority ACAA Automatic chemical agent alarm ACAP Application Configuration Access Protocol (computing) ACAPS Area communications electronics capabilities ACARS Aircraft Communications Addressing and Reporting System ACAT Acquisition Category ACC (1)Air Combat Command (US) ACC (2)Area Communication Center ACC (3)altocumulus castellanus ACCHAN Allied Command Channel ACCINTNET ACC Intelligence Network ACCMSF Advanced Cooperative Collection Management ACCS Air Command and Control System ACE Airborne Command Element ACERT Army Computer Emergency ACF Autocorrelatio n Factor Response Team ACFT MSHP aircraft mishap ACI Air Control Intercept ACINT Acoustic intelligence ACIS Air Combat Information System ACJ Advisory Circular, Joint ACK Positive Acknowledgment (ASCII 06) ACLS Automatic Carrier Landing System ACM (1)Association for Computing Machinery ACM (2)Advanced Cruise Missile ACM (3)Air Combat Maneuvering ACMI Air Combat Maneuvering Instrumentation ACOM U.S. Atlantic Command ACP (01)Allied Communication Publication (127, etc) ACP (02)Allied Communication Protocol ACP (03)Adjacent Channel Power ACP (04)Adjacent Channel Protection ACP (05)Access Control Point ACP (06)Access Control Protocol ACP (07)Access Communications Processor ACP (08)Achieved Communication Performance (ARINC) ACP (09)Adaptive Communications Processor ACP (10)Advanced Communications Package ACP (11)Alternate Command Post ACP (12)Airborne Command Post ACP (13)Area Command Post ACP (14)Automated Command Post ACP (14)Applied Communication Program ACP (15)Automatic Communications Processor ACP (16)Automatic Colt Pistol ACP (17)Autoloadin g Colt Pistol ACP100 Allied Call Sign and Address Group System - Instructions and Assignments ACP110 Tactical Call Sign Book ACP112 Task Organization Call Sign Book ACP113 Call Sign Book for Ships ACP117 Allied Routing Indicator Book ACP119 Allied Tactical Voice Call Sign System - Instructions and Assignments ACP121 Communications Instructions - General ACP122 Communication Instructions - Security ACP123 Common Messaging Strategy and Procedures ACP124 Communication Instructions - Radiotelegraph Procedure ACP125 Communication Instructions - Radiotelephone Procedure ACP126 Communication Instructions - Radioteletype Procedure ACP127 Communication Instructions - Tape Relay Procedures ACP127SUP1A Allied RATT Procedures (RTTY) ACP128 ALTERS Operating Procedures ACP129 Communications Instructions - Visual Signalling Procedures ACP130 Direction Finding Procedure ACP131 Communication Instructions - Operating Signals ACP134 Telephone Switchboard Operating Procedure ACP135 Communications Instructions - Distress and Rescue Procedures ACP136 Communication Instructions - Panel Signaling ACP147 Call Sign Book for Merchant Ships in Time of War ACP148 Allied Guide to Master ACP149 Radio Communication Instructions for Merchant Ships Under Naval Control ACP150 Recognition and Identification Instructions, Air, Land, and Sea Forces ACP160 IFF SIF Operational Procedures ACP165 Operational Brevity Codes ACP167 Glossary of Communications-E lectronics Terms ACP168 Pyrotechnic Signals ACP176 Allied Naval and Maritime Air Communication Instructions ACP177 Land Forces Electronic Warfare Instructions ACP178 Maritime Electronic Warfare Instructions ACP179 Electronic Warfare Instructions for Air Forces ACP190 Guide to Frequency Planning ACP198 Instructions for the Preparation of Allied Communications Publications ACR Armored cavalry regiment ACRM Automated Communication Resource Manager ACRONYM Actual Computer Related Overused Name You Mention ACS (1)Assistant chief of staff ACS (2)Agile Combat Support ACS (3)Airborne COMINT System ACS (4)Attitude Control System ACSB Amplitude Compandored SideBand ACSL altocumulus standing lenticular cloud ACT Airborne Communications Terminal ACTD Advanced Concept Technology Demonstration ACTEX Active Controls Technology Experiments ACTIVE Advanced Controls Technology for Integrated Vehicles ACTS (1)Air Combat Training System ACTS (2)Automated Computer Time Service ACU Avionics Control Unit ACW Air Control Wing (like 552nd AWACS at Tinker) ADA (1)Americans with Disabilities Act ADA (2)"Official" DoD computer language, not an acronym, named for Ada Babbage, the world's first programmer ADAS AWOS Data Acquisition System (Nice nested acronym) ADC Analog-to-Digi tal Convertor ADCC Air Defense Control Center addr Address ADDS Aviation Digital Data Service ADES Airdrop equipment and systems ADF (1)Automatic direction finding ADF (2)Australian Defence Forces ADIZ Air Defense Identification Zone ADM Admiral ADMD Administration Management Domain ADO (1)ActiveX Data Objects ADO (2)Active Data Objects ADOC Air defense operation center ADONIS Article Delivery Over Network Information Systems ADP Automated data processing ADPCM Adaptive differential pulse-code modulation ADPE Automated Data Processing Equipment

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ADPS ADPSIS ADPSO ADPSSO ADR ADRG ADS ADS ADS-B ADSI ADSL Ae AEEC AEOS AEPDS AES AF AF AFAMPE AFATDS AFB AFC AFCA AFCS

ASARS Data Processing Station Automated Data Processing Software Inventory System Automated Data Processing Security Officer Automated Data Processing System Security Officer CW brevity: address ARC Raster Digitized Graphics (1)Advanced Distributed Simulation (2)Automatic Dependent Surveillance Automated Dependent Surveillance-Bro adcast Air Defense System Integrator Assymetric Digital Subscriber Line Auroral Electrojet magnetic activity index Airlines Electronics Engineering Committee Advanced Electro-Optical System Spectrograph Advance Electronic Processing and Dissemination System Application Environment Specification (1) Air Force (2) Audio Frequency (30 Hz - 30 kHz) Air Force Automated Message Processing Exchange Advanced Field Artillery Tactical Data System Air Force Base Automatic frequency control Air Force Communications Agency (US) Automatic Flight Control System

AFDC Air Force Doctrine Center System (ground computer network) AFEPS ACARS Front-End Processor AFETR Air Force Eastern Test Range AFEWES Air Force Electronic Warfare Effectiveness Simulator AFFSA Air Force Flight Standards Agency AFGIHS Air Force Geographic Information Handling System AFGWC Air Force Global Weather Central at Offutt AFB, NE AFI (1)Africa/Indi an Ocean (MWARA) AFI (2)Air Force Instruction (official directive) AFI (3)American Film Institute AFIT Air Force Institute of Technology AFIWC AF Information Warfare Center AFK Absolute Frequency Keying (amateur very slow Piccolo) AFMC Air Force Materiel Command AFMSS Air Force Mission Support System AFN American Forces Network (US broadcast for military) AFNET Air Force Integrated Telecommunicati ons Network AFOS Automation of Field Operations and Services AFOSR Air Force Office of Scientific Research AFR Armed Forces Radio AFRES Air Force Reserve (US) AFRL Air Force Research Laboratory AFRN Armed Forces Radio Network AFRTS Armed Forces Radio & Television Services AFS (1)Air Force Station AFS (2)Aeronautica l Fixed Service AFSAA AF Studies and Analysis Agency AFSATCOM Armed Forces Satellite Communication AFSFC Air Force Space Forecasting Center AFSFCR AF Space Forecast Center Replacement AFSK Audio frequency-shift keying AFSOC Air Force Special Operations Command AFSOF Air Force Special Operations Forces AFTCO Air Force Telecommunicati ons Certification Office AFTN Aeronautical Fixed Telecommunicat ion Network AFV Alternate Fuel Vehicle AFW Air Force Weather AFWSS Air Force Weather Support System AFWTF Atlantic Fleet Weapons Training Facility AG (1)Adjutant general AG (2)Airlift Group AGC Automatic gain control AGE Aerospace Ground Equipment (pronounced like how old you are; when you replace it you order New Age) AGL (1)Above ground level AGL (2)Air to Ground Laser AGM Air to Ground Missile AGU American Geophysical Union AGWPE AGW Packet Engine (creator: SV2AGW) Ah Ampere-hour(s) , battery capacity AH Authentication Header AHAMSL Antenna height above mean sea level AHD Acoustic Hailing Device AHDL Analog Hardware Descriptive Language AHF Adaptive High Frequency AHMSL Antenna height above mean sea level AHP Army Heliport AI (1)Artificial intelligence AI (2)Air Interdiction AI (3)Airborne Interceptor AI (4)Avionics Infrastructure AIA Air Intelligence Agency AIC Air Intercept Control AICPITS All India Coordinated Program of Ionosphere & Thermosphere Studies AIDA Atmospheric Investigations of Dynamics over Arecibo AIDC Automatic Identification and Data Capture AIFSS Automated International Flight Service Station AIG (1)Address Indicator Group AIG (2)Air Intelligence Group AIM (1)Air launched Interceptor Missile AIM (2)AOL Instant Messenger (popular internet talk program) AIN Advanced Intelligent Network (US NCS) AIR (1)All-India Radio AIR (2)Aviation Incident Response (Red Cross) AIREP Air Report; weather observation, like a PIREP AIRES Advanced Imagery Requirements and Exploitation System AIRK Area interswitch rekey AIRMET Air Meteorological Information AIRST Advanced Infrared Search and Track AIS (1)Automatic Identification System (USCG) AIS (2)(Universal) Automated Identification System AIS (3)Alarm Indication Signal AJ Anti-Jam AJCOM Anti-Jam Communications AkDT Alaskan Daylight Time, US AkST Alaskan Standard Time, US AL Approach and landing ALARM Air-Launched Anti-Radiation Missile ALC (1)Automatic level control ALC (2)Air logistics center ALC Air Logistics Center ALCC (1)Airborne Launch Control Center ALCC (2)Airlift Coordination Cell ALCE Airlift Control Element ALCF Airlift Control Flight ALCM Air Launched Cruise Missile ALCS (1)Airlift Control Squadron ALCS (2)Airborne Launch Control System ALE Automated Link Establishment ALERT Attack & Launch Early Reporting to Theater ALF Absorption Limiting Frequency, realtime version of LUF AlGaN Aluminum-Galli um Nitride ALOC Air lines of communication Aloha Wide-area net protocol, developed at U of Hawaii ALP airport location point

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Alpha + # Aircraft maintenance status (1 is best) Alpha Hotel A-- H--- (also Adam Henry) ALQA Active Link Quality Analysis ALS Airlift squadron ALTERS Allied Telecommunicati ons Record System ALU Arithmetic Logic Unit (computer h/w) ALW Airlift Wing AM (1)Amplitude Modulation AM (2)Aeronautica l Mobile AM (3)Ante Meridian, hours between midnight and 11:59 local AMARC Association Mondiale des Radiodiffusuers Communautaires AMASS Airport Movement Area Safety System AMBALG Algerian Embassy AMC (1)Air Mobility Command (old Air Force MAC, MATS) AMC (2)Army Materiel Command (US) AMCC Air Mobility Control Center AMCLD Active Matrix Liquid Crystal Display AMCO Aircraft maintenance company AMCS Air Mobility Control Squadron AMD (1)American Micro-Devices (with Cyrix, Intel's competition) AMD (2)Automatic Message Display AMDRFM Advanced Monolithic Digital Radio Frequency Memory AME (1)Automatic Message Exchange AME (2)Air Mobility Element AME AMEDD AMI AMMCS AMO AMOG AMOS AMP AMPS AMPS AMRAAM AMRAD AMRS AMS AMSA AMSAT AMSI AMTOR AMVER AMW AMX AN AN/FRT AN/GRC AN/MRC ANARC ANDVT ANG ANGB ANI ANL

(3)Amplitude modulation equivalent Army Medical Department Alternate Mark Inversion Airborne Multimedia Multiservices Communication System Air & Maritime Operations Air Mobility Operations Group Air Force Maui Optical Site Antenna Maintenance Program (1)Advanced Mobile Phone Service (2)Automated Mission Planning System Advanced Medium-Range Air-to-Air Missile Amateur Radio Research And Development Corporation Austrian Military Radio Society Analog Mixed Signal Australian Maritime Safety Agency Radio Amateur Satellite, Inc. Arctic Maritime Safety Information Amateur Teleprinting Over Radio (Ham SITOR) Automated Mutual Assistance Vessel Rescue System Air Mobility Wing Air Mobility Express Army/Navy (prefix on US military type designators) Army/Navy Fixed Radio Transmitting Army/Navy General Radio Communication Army/Navy Mobile Radio Communication Assn. of North American Radio Clubs Advanced Narrowband Digital Voice Terminal Air National Guard Air National Guard Base Automatic Number Identification Automatic noise limiter

ANMCC Annmt Annr ANS ANSI ANT ANT ANZUK ANZUS AO AO1 AO2 AOA AOA AOC AOC AOC AOE AOI AOO AOR AOR AOV AOS AOS Ap AP APC APCO 25 APCO API APIC APIPA APL APLink APNIC APO APO APOD APOE APPCON APRNT APRS APRS APRX APSC APT APU AQC AR AR AR AR ARA ARB ARC ARC ARC ARC-190 ARC-220 ARC-230 ARCAL Archie ARCP ARD ARDF ARDF AREC AREC ARES ARF ARFA ARFOR

Alternate National Military Communications Center (?)-WAR 46 Announcement Announcer Advanced Network Services, operates an Internet backbone American National Standards Institution (1)Antenna [~] (2)Advantaged Node technology Australia, New Zealand, United Kingdom (alliance) Australia, New Zealand, United States (alliance) Area of operations automated station without precipitation discriminator automated station with precipitation discriminator (1)Angle Of Arrival ACARS Over AVLC (ARINC, neat nested acronym) (1)Air Operations Center (2)Army Operations Center (Pentagon) (3)Air Operational Control Airport of Entry Area Of Interest Area of operations (1)Area of responsibility (2)Atlantic Ocean Region (USCG GMDSS) ACARS Over VDL (ARINC, neat nested acronym) (1)Acquisition Of Signal (2)Area Of Service Planetary A index of geomagnetic activity Associated Press Armored personnel carrier New standard for digital public safety radio Association of Public Safety Communications Officials Application Programming Interface (computers) APCO Project 25 Interface Committee Automatic Private Internet Protocol Addressing A Programming Language (computer code) Amtor-Packet Link Asia Pacific Network Information Centre (1)Air Post Office (2)Army Post Office Aerial port of debarkation Aerial port of embarkation Approach Control apparent (1)Automatic Position Reporting System, ham tracking w/GPS (2)Automatic Packet Reporting System approximately APCO Project 25 Steering Committee Automatic Picture Transmissions Auxiliary Power Unit Automatic Quick Call (1) Aerial refueling (2) Ground track for above (3) CW prosign: "End of message" (4) Army Regulation Appletalk Remote Access, Mac networking Air Reserve Base (1)American Red Cross (2)Airborne Radio Communications (AN/ARC-xxx) (3)Air Reserve Component Common Collins mil HF aircraft radio, civil version is HF-190 Fancy Collins HF radios for new US mil aircraft Collins 400-watt HF Link-11/Tadil-A aircraft radio, civil voice version is HF-121 Aircraft Radio Control of Aerodrome Lighting Internet database search program, finds files Air Refueling Control Point Automatic Ring Down (1)Automatic Radio Direction Finding (2)Amateur Radio Direction Finding (1)Air resource element coordinator (2)Amateur Radio Emergency Corps, now ARES Amateur Radio Emergency Service Air Reserve forces Allied Radio Frequency Agency Army forces

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ARG ARG ARGOS ARIA ARIB ARIDPCM ARIN ARINC ARIP ARISS ARM ARMRV ARMRV ARNG ARO ARP ARPA ARPANET ARQ ARQ6-90 ARQ-E3 ARRL ARRS ARS

(1)Amphibious Ready Group (2)Air Refueling Group Advanced Research and Global Observation Satellite Advanced Range Instrumentation Aircraft Association of Radio Industry Businesses (Japan) Adaptive Recursive Interpolated Differential Pulse Code Modulation (whew!) American Registry for Internet Numbers Aeronautical Radio, Inc (US radio consortium) Air Refueling Initial Point Amateur Radio on the International Space Station Anti-Radiation Missile (1)Armored Mobile Reconnaissance Vehicle (2)Armored Multi-Role Vehicle Army National Guard Army Research Office Address Resolution Protocol, Internet Advanced Research Projects Agency, operated original Internet ARPA Network, became NSFNET, now separate from Internet Synchronous transmission and automatic repetition teleprinter system ("Acknowledge Request") Six-character blocks simplex ARQ teleprinter system Single channel ARQ teleprinter system American Radio Relay League Aerospace Rescue and Recovery Service Amateur Radio Service

ARSA (1)Airborne Reconnaissance and Surveillance Architecture (2)Airport Radar Service Area ARSOF Army special operations forces ARTCC Air Route Traffic Control Center ARTE (1)French media company ARTE (2)ADA Run Time Environment ARTG Amateur Radio Teleprinter Group (Swiss) ARTS Automated Remote Tracking Station ARW Air Refueling Wing (USAF/AFRES) ARWO Aerial Reconnaissance Weather AS (1) Air station AS (2) CW prosign: "Please Wait" AS (3) Analog secure (like original PARKHILL) AS (4)Submarine Tender (USN) ASA American Standards Association, obsolete ASAM Anti-Shipping Activity Message (warning) ASAP As Soon As [humanly] Possible; how one handles FLASH traffic ASAR Advanced Synthetic Aperture System ASARS Advanced Synthetic Aperture Radar System ASAS All Source Analysis System (US Army) ASAS-RWS ASAS Reconfigurable Work Station ASAT Antisatellite ASB Aviation support battalion ASC (1)AUTODIN Switching Center ASC (2)Accredited Standards Committee (ANSI) ASC (3)American Society of Cameramen (motion picture) ASC2A Air & Space Command & Control Agency ASCC Army service component command ASCIET All Services Combined Identification Evaluation Team ASCII American Standard Code for Information Interchange, 7-bit computer alphabet, usually extended to use 8th bit ASCOT Air Support Command Operations Task (RAF Air Transport) ASD ASDE-3 ASDS ASEAN ASECNA ASF ASG ASG ASIC ASID ASIM ASIO ASIT ASK ASL ASLAR ASM ASM ASM ASMB ASMC ASME ASMRO ASO ASOC ASOS ASOTSE ASP ASP ASP ASP ASR ASR Assn Assoc AST ASTM ASU ASW AT AT ATA ATA ATA ATAPI ATC ATCALS ATCALS ATCCS ATCS ATCT ATD ATDL 1 ATF ATF ATH ATG ATHS ATIS ATM ATM ATM ATMs ATN ATO ATOI A-TOR ATP ATP ATP ATP ATP ATR

AssistantSurface Secretary of Defense Airport Detection Radar System Advanced SEAL Delivery System (a minisub; see SEAL) Association of South East Asian Nations (old SEATO) Agence pour la Securite de la Navigation Aerienne en Afrique et a Madagascar Advanced Systems Format (Microsoft media player) (1)Aeronautica l Standards Groups (2)Area support group Application Specific Integrated Circuit Advanced Secure Information Dissemination Automated Security Incident Measurement Australian Security Intelligence Organisation Adaptable Surface Interface Terminal Amplitude Shift Keying Above Sea Level Aircraft Surge Launch and Recovery (1)Air to Surface Missile (2)Analog Switching Module (3)Assembler (computer code) Area support medical battalion Area support medical company American Society for Mechanical Engineers Armed Services Medical Regulating Office Air surveillance officer Air Support Operations Center Automated Surface Observation System Army special operations theater support element (1)Ammunition supply point (2)Acquisition Support Plan (3)Active Server Pages (4)Application Service Provider (1)Automatic Send-Receive (2)Airport Suveillance Radar Association Association Atlantic Standard Time, Canada American Society for Testing and Materials Aircraft Starting Unit Anti-submarine warfare (1)Advanced Technology (IBM's original name for its improved PC, now a standard architecture) (2)Amateur (radio allocation code) (1)Army Technical Architecture (2)AT Attachment (3)American Trans Air AT Attachment Packet Interface Air Traffic Control (1)Air Traffic Control and Landing System (2)Air Traffic Control Liaison Section Army Tactical Command & Control System Advanced Train Control System airport traffic control tower Advanced Technology Demonstration Army Tactical Data Link 1 Advanced Tactical Fighter Bureau of Alcohol, Tobacco & Firearms Air Transportable Hospital Afloat Training Group (USN) Automatic Target Hand-off System Automated Terminal Information System (usually voice loop) (1)Asynchronou s Transfer Mode, 53-byte packets (2)Automated Teller Machine (3)Advanced trauma management Air Tasking Messages Adventist Television Network Air Tasking Order Aerial Track Of Interest Automated Telex Over Radio (1)Ammunition transfer point (2)Appletalk Transaction Protocol, Mac networking (3)Acquisition , Tracking & Pointing (4)Authority to Proceed (5)Air Traffic Procedures Air Transport Rack (standard airplane radio bay)

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ATR/ATC Automatic Target Recognition/ Automatic Target Correlation ATS (1)Aeronautica l Telecommunicat ions Services ATS (2)Application s Technology Satellite ATSA Aviation and Transportation Security Act ATU (1)Antenna Tuning Unit ATU (2)Arab Telecommunicat ions Union ATU-A Arabic ATU-80 alphabet ATV (1)Amateur (fast-scan) television ATV (2)All-Terrain Vehicle AUI Attachment Unit Interface, Ethernet AUSREP Australian Ship Reporting System AUTO Weather observation is from automated station [~] AUTOCONET Automatic Digital Network Conference Network AUTODIN Automatic Digital Network (US military) AUTOVON Automatic voice network (now DSN as of 1990) AUV Autonomous Underwater Vehicle AUW All Up Weight (gross) AV Air Vehicle AVC Automatic volume control AVHRR Advanced Very High Resolution Radiometer AVI Audio Video Interleave (Microsoft file format) AVIM Aviation intermediate maintenance AVL Automatic Vehicle Locating AVLC (1)Aviation VHF Link Control AVLC AVN AVO AVTR AVUM AWACS AWADS AWAPS AWDS AWG AWGN AWIPS awk AWN AWO AWOL AWOS AWR AWS AWS AWS AWS AWST AX.25 B B B&G B/m B/U B+ B8E

(2)Automatic Vehicle Location and Control AViatioN weather model Air Vehicle Operator Airborne Video Tape Recorder Aviation unit maintenance Airborne Warning And Control System Adverse Weather Aerial Delivery System Automated Weather Distribution System Adverse Weather and Debriefing System American Wire Gauge Arbitrary White Gaussian Noise Advanced Weather Interactive Processing System Aho, Weinstein & Kernighan, wrote a Unix script language Aviation Weather Network, now on US Air Force Digital Weather Switch American Waterway Operators Absent without leave Automated Weather Observing System Adventist World Radio (1)Air Weather Service (2)Advisory Warning System (3)Automated Weather Systems (4)Automated Weather Station Automated Weather Station Amateur variant of CCITT X.25 packet radio protocol (1)began (2)old "B" battery for tube plates, typically 90 volts Bombing & Gunnery Benchmark Backup Tube plate voltage (highest in set) Mode: Independent sideband, different voice programs

B9W BA BAA BAA BAC BAe Bae BAI BAI Balun BAM BAN BANANA BAQ BAS BASIC BAT BAT BAT Baud BBC BBCS BBIS BBN BBS BBS BC BC BC BC2A BC3 BCA BCB BCC BCC BCC BCC BCD BCD BCE BCF BCFG BCI BCI BCL BCL BCM BCO BCO BCO BCP BCP BCS BCT bd BDA BDA BDAR bde BDU BDU BEAR BEC BEEF BEL Bel BEP BEP BER BERT BERT BF BFACS

Mode: Independent sideband, mixed voice & data modes Braking action (1)Broad Agency Announcement (2)Broad Area Announcement Broad Area Coverage British Aerospace British Aerospace Backup Aircraft Inventory Battle Area Interdiction Balanced-to-un balanced line transformer [~] Beta and Advection Model (wx) Base Area Networks Build Absolutely Nothing Anywhere Near Anyone (municipal response to most radio proposals) Basic allowance for quarters Basic allowance for subsistence Beginners' All-Purpose Symbolic Instruction Code, computer language (1)Blood Alcohol Testing (the "Batmobile," in the field) (2)File extension: execute as command list (Batch job) (3)Brilliant Anti-armor Submunition Computer transmission unit, one state transition per second, no longer one bit per second in complex modulation schemes British Broadcasting Corporation Broadband Connectivity Service (Swisscom) Battle Broadcast Information System Backbone network (1)Bulletin Board System (computer networking) (2)Battery backup system (1)Broadcast (2)Back course (3)Patches (of sig. Weather) Bosnia Command & Control Augmentation Battle management and command, control and communications Broadcast Control Authority Broadcast Band (typically 540-1710 kHz) (1)Base Communication Center (2)Bureau Communication Center (LAPD) (3)Battlefield circulation control (4)Blind Carbon Copy (e-mail) (1)Binary-code d decimal (2)Bad conduct discharge Base civil engineer Backup communications facility, Dahlgren, VA Fog patches (1)Broadcast interference (from xmtr to bc) (2)Binary-code d information (1)Broadcast listener (2)Broadcast Communications Limited (New Zealand) Baseline correlation matrix (1)Base communications officer (2)Base contracting officer (3)Broad concept of operations (1)Base communications package (2)Base comprehensive plan Broadcast Keying Station Battlefield Communications Terminal Baud (1)Battle damage assessment (2)Bermuda (NASA) Battle damage assessment and repair Brigade (1)HFDL: Basic Data Unit (2)Battle dress uniform Beam Experiment Aboard Rocket Bulk encrypted communications Base Engineering Emergency Force,("Prime BEEF team") Bell (ASCII, RTTY) Unit of voltage or power ratio, named for Alexander Graham Bell, usually expressed in deciBels (1)Bit error probability (2)break-even point Bit Error Rate (1)Bit error rate test(er) (2)Bit Error Rate Testing Basic Function Battlefield Functional Area Control Systems

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BFBS BFO BFO BFSK BG BGEN BGP BICE BID BIDDS BIDS BIFC BIFC BiFET BIH BILS Bin BIND BIND BIND Binhex BIOS BIOT BIP

British Forces Broadcasting Service (1)Beat frequency oscillator (CW/SSB mode of receiver) (2)Backhaul follow-on Binary Frequency-Shift Keying Brigadier general Brigadier general Border Gateway Protocol (TCP/IP) Bureau of Immigration and Customs Enforcement Billing Identifier Base integrated digital distribution system Backup information display system (1)Boise Interagency Fire Cache, obsolete (2)Boise Interagency Fire Center, now NIFC Bipolar Field Effect Transistor Bureau International l'Heur, International Time Bureau, coordinates UTC leap seconds Ballistic Impact Locator System Binary (1)Berkeley Internet Name Domain (2)Berkeley Internet Name Daemon (old) (3)Buggy Internet Name Daemon (geekspeak) Binary to hexadecimal, usually for sending binaries as ASCII Basic Input/Output System (part of computer op-system) British Indian Ocean Territory Base Information Protect

BIPS (1)Billion Impact Instructions per System Second (computing) BIPS (2)Backup Prediction BIPS Billion Instructions Per Second B-ISDN Broadband-Integrated Services Digital Network BIST Built-In-Self-Test Bit (1)BInary digiT, a one or zero, basic digital information unit BIT (2)Built-In Test BIT Built in Test Bit/s Bit per second BITE Built-In Test Equipment BITNET Because It's Time NETwork, from IBM, now global BIU Bus interface unit (computer h/w) BK CW prosign: long break or break-in BKN Broken cloud cover BL (1)Baseline BL (2)blowing BLAISE (1)British Library Automated Information Service BLAISE (2)Blaise Pascal, French Mathematician BLDU Blowing dust BLER Block Error Rate BLERT Block Error Rate Testing BLEVE Boiling Liquid Expanding Vapor Explosion BLM Bureau of Land Management (US) BLOS Beyond line of sight BLPY Spray BLS Bureau of Labor Statistics (US) BLSA Blowing sand BLSN Blowing snow BM Battle Management BMC2 Battle Management, Command and Control BMC3 Battle Management, Command, Control and Communication BMC3I BMC4ISR BMD BMDATC BMDC BMDCCC BMDE BMDO BMDOC BMDSCOM BMEWS BMO BMOPS BMP BMP BMS BMT BMT BMT BMT BMT/SS bn BN BNC BNC BNC BNCC BNCR BnOC BNSC BO BoD BOM BOND BOOTP BOOTP BOPS BOQ BORAM BOSS BOT bot BP BPI BPL bpp bps Bps BPSK BQ BQ BR BR BRAC BRACC BRB BRD brdg BRI BRI BRV BRV BS BS BS BS BSA BSA BSC BSD BSE BSS BSS

Battle Management C3I C4I Surveillance and Reconnaissance Ballistic Missile Defense Ballistic missile defense advanced technology center Ballistic Missile Defense Center Ballistic missile defense command and control center Ballistic missile defense enhancement Ballistic missile defense organization, formerly SDIO Ballistic missile defense operating center Ballistic Missile Defense Systems Command, now U.S. Army Strategic Defense Command Ballistic Missile Early Warning System Ballistic Missile Office (US) Battle Management Operations (1)File extension: bitmap image (2)Battle manager processor Backward Music Station (weird RF feedback on HF) (1)Ballistic Missile Threat (2)Beam Management Terminal (3)Bronx Motor Transit (4)Ballistic Missile Technology Ballistic Missile transporter, storage and shipping Battalion CW prosign: repeat between -- and -(1)Bayonet Neill-Concelman (cable connector) (2)Bayonet Navy Connector (alternate) (3)Blimped Noiseless Camera (Classic Mitchell) Base Network Control Center Blimped Noiseless Camera, Reflex Battalion Operations Center British National Space Center Bad Order (inoperative unit writeup) Board of Directors Bureau Of Meteorology (Australia) Beginning Of Next Day Bootstrap Protocol Bootstrap Protocol (IP addressing) Billion operations per second (computing) Bachelor Officer Quarters Block-Oriented RAM Battlefield Optical Surveillance System Beginning of Tape Robot, typically a network program that does an admin duty Bandpass Boost-Phase Intercept Broadband over Power Line bits per pixel Bit per second, not necessarily a "baud" Bytes per second Biphase Shift Keying (1)Beam Quality (2)Acknowledgi ng receipt (DSC protocol) Bridgewire resistance mist Base Realignment And Closure Base Realignment And Closure Commission (US military) Be Right Back (Internet) Broadcast bridge Basic Rate Interface Basic Rate ISDN, 2 64Kbps channels (1)Booster Recovery Vessel (NASA) (2)Ballistic reentry vehicle (Stratcom) (1)Battle staff (2)Battle station (3)Backspace (4)aka "Bravo Sierra;" the excrement of bulls (1)Brigade support area (2)Birmingham Small Arms Base security council Berkeley Software Distribution (Unix type) Broadcast Satellite Experiment (1)Broadcast Satellite System (2)Broadcastin g Satellite Service

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BSSC BSTRS BSU BSU BSVS BT BT BT BTC BTH BTI BTL Btry BTS BTW Buff BUFR BULLDOG BUMCS BUR BURN BVR BVR BW

Battle staff support center Base Support Trunked Radio System, aka "B-STARS" (1)Baseband separation unit (2)Bulk Storage Unit Backup Secure Voice System (1)("Bravo Tango") Bomb threat (2)CW prosign: short break (3)British Telecom Block transfer controller (computing) Below (beyond) the horizon British Telecom International Black telemetry (USAF) Battery Broadcast Transmitting Stations By the way Big Ugly Flying F[ellow] (B-52) Binary Universal Format for Representation BULLSEYE US Navy HF upgrade, like USAF's SCOPE, but includes DF [~] Backup Master Control Station (GPS, Gaithersburg, MD) Bottom Up Review 1000W UHF aircraft orderwire (US mil; not an acronym, refers to high power) Beyond Visual Range Beyond visual range (1)Bandwidth

BW BWC BWS BX BZ C C C C C C c C&DH C&DP c/s c/w C2 C2CM C2IPS C2P C2V C2W C2WC C3 C3F C3I C3S C3SMP C4I C4ID C4IFTW

(2)Biological Weapon Bandwidth Compression Base weather station Base exchange ("Bravo Zulu") Good job (1)Capacitance , in farads (2)Confidential (3)the C programming language (4)Celsius (5)Designator for head of British MI6 (6)Center (with reference to runway designation) The speed of light, and radio waves, in a vacuum Communications & Data Handling Communications & Data Processing Callsign Callword Command and Control Command and Control Countermeasures Air Mobility Command and Control Information Processing System Command and Control Processor Command and Control Vehicle Command and Control Warfare Command and Control Warfare Commander (US Navy) Command, Control and Communications Mode designation: television or video Command, Control, Communications and Intelligence Command, control and communications segment Command, control and communications system master plan Command, Control, Communications, Computers and Intelligence Command, Control, Communications, Computers and intelligence Dissemination C4I for the Warrior

C4ISR Command, Control, Communications, Computer Computing, Intelligence, Surveillance, & Reconaissance C4S Systems C4SMP Command, control, communications and computers system master plan CA (1)civil affairs CA (2)COMSEC Account CA (3)cloud-air lightning CA (4)Counter Air CA (5)Cyanoacryla te (Super Glue) CAATS Canadian Automated Air Traffic System CAB Combat Area Broadcast CACS Command And Control Squadron CAD (1)Computer-ai ded design CAD (2)Coherent amplitude detector CAD (3)Computer-ai ded dispatch CAD/CAM Computer aided design/computer aided manufacturing CADRG Compressed Arc Digitized Raster Graphics CAE (1)Common Application Environment CAE (2)Computer Aided Engineering CAEWIS Computer Aided Electronic Warfare Information System CAF Combat Air Forces CAFWSP CAF Weather Support Package CAI (1)Computer-ai ded instruction CAI (2)Cooperative Airborne Identification CAINS Carrier Aircraft Inertial Navigation System CAL Calibrate, calibration CALLS Contact And Long-range Liaison System (USCG) CALM Codan Automated Link Management CALS (1)Computer-ai ded Acquisition & Logistics System CALS (2)Contingency Airfield Lighting System CAM Computer-aided manufacturing camo Camouflage CAMO Computer-aided manual operation CAMSLANT Communications Area Master Station, Atlantic CAMSPAC Communications Area Master Station, Pacific CAN (1)Cancel (ASCII) CAN (2)Controller Area Network (industrial automation) CANFORCE Canadian Forces CANR Canadian NORAD Region CANUS Canada/US CAOC (1)Combined Air Operations Center CAOC (2)Combined Allied Operations Center, Vicenza, IT (Allied Force) CAP (1) Civil Air Patrol CAP (2) Carrierless Amplitude Phase CAPCOM Capsule Communicator (NASA) CAPEG Cape Canaveral Ground Antenna (GPS) CAPPS Computer Assisted Passenger Prescreening System CAPS Center for the Analysis and Prediction of Storms (NWS) CAPT Captain CAR Caribbean (MWARA) CARB Channel Availability Radio Bulletin (NATO) CARCAH Chief, Aerial Reconnaissance Coordination, All Hurricanes (NHC) CARIBROC Caribbean Regional Operations Center CARR Corrective Action Request & Report CAS (1)Close Air Support CAS (2)Collision Avoidance System CAS (3)Calibrated Air Speed CASE (1)Common automated system execution CASE (2)Computer-ai ded software engineering CASE (3)Computer-ai ded system engineering CASREP Casualty Report CAT (1)Clear Air Turbulence CAT (2)Computer Aided Transceiver, proprietary control interface CATIS Computer Aided Tactical Information System CATT Computer Assisted Technology Transfer CATV Community Antenna Television ("cable") CAU Crypto Ancillary Unit CAV (1)Collision Avoidance CAV (2)Conditional ly Available (LA City FD) CAV (3)Ceiling and visibility CAVOK Ceiling & Visibility OK (non-US METAR) CAVU Ceiling & visibility unlimited CB (1)Citizen Band Radio (legal or otherwise, around 27 MHz) CB (2)Cumulonimbu s (thundercloud)

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CBAA C-band CBC CBFS CBM CBMAM CBP CBR CBR CBRN CBS CBT CBT CBTS CBU CBW CBW CC CC CC CC CC CC CC

Community Broadcasting Association of Australia 4-8 GHz microwave band Canadian Broadcasting Company Cesium Beam Frequency Standard Central battle management Cumulonimbus mammatus cloud Customs and Border Protection (1)Chemical, Biological, Radiological (warfare) (2)Constant bit rate Caribbean Basin Radar Network Columbia Broadcasting System (U.S.) (1)Computer-ba sed training (2)Combat Computer-based training system Cluster Bomb Unit (1)Chemical & Biological (warfare) (2)Constant bandwidth (1)Transmissio n is in Standard Chinese ("Mandarin") (2)Command & Control (3)Command Center (4)Control Center (5)Commander (6)Computer controller (7)Copies

CC (8)C Compiler (unix) CC (9)cloud-cloud lightning CC&D Camouflage, concealment and deception CC&R Covenants, Conditions & Restrictions; what you check before buying a home if you intend to build an antenna there CCAS Cape Canaveral Air Station, FL, formerly CCAFS CCB (1)Configurati on Control Board CCB (2)Computer Controlled Brake (railroad) CCC (1)Central computer complex CCC (2)Communicati ons control complex CCC (3)Consolidate d Command Center (NORAD) CCD Charge Coupled Device CCDM Consultative Committee for the Definition of the Meter CCDS Consultative Committee for the Definition of the Second CCE (1)Command & control element CCE (2)Consultativ e Committee on Electricity CCEMRI Consultative Committee for Ionizing Radiations CCG Calibration Coordination Group CCIP Continuously-C omputed Impact Point CCIR International Radio Consultative Committee, now ITU-R CCIR 476-4 International SITOR character set CCIRID Charge-coupled infrared imaging device CCITT Comite Consultatif International de Telegraphique et Telephonique (International Telegraph & Telephone Consultative Committee), obsolescent CCL Common Command Language CCM (1)Combined Cipher Machine (WWII Allies) CCM (2)Counter-Countermeasures CCMC Canadian Centre for Maritime Communications CCP Console Command Processor, part of CP/M CCPC Civil Communications Planning Committee (NATO) CCPDS-R Command Center Processing and Display System - Replacement CCR Central Control Room CCRP Continuously-C omputed Release Point CCS CCSL CCT ccTLD CCTV C-cubed CCV CCW CCW CCW CCW CCW CD CD CD CDA CDA CDB CDC CDC CDC CD-DA CDE CDF CDF CDHF CD-I CDIS CDL CDM

(1)Continuous Commercial (2)Charge Control System Service (power rating) cirrocumulus standing lenticular cloud Computer Compatible Tape Country Code Top Level Domain Closed Circuit Television Command Control and Communications Code change verifier (1)Counter-clockwise (2)Command & Control Warfare (3)Continuous Carrier Wave (4)Coherent CW (5)Class C CW biasing (most efficient) (1)Compact Disc (2)Civil Defense (in U.S., now FEMA) (3)Carrier detect (modem line) (1)Central distribution amplifier (2)Command & data acquisition Command data buffer (1)Canadian Department of Communications (2)Centers for Disease Control (US) (3)Control Data Corporation Compact Disc Digital Audio (format, part of the "Red Book") Common Desktop Environment (1)Common Data Format (2)California Division of Forestry (fire fighters) Central Data Handling Facility Compact Disc - Interactive (one format in the "Green Book") Canadian Defence Intelligence Staff Common Data Link Chemical Downwind Message (US Army)

Multiple Access CDMA OneCode Division (IS-95) Qualcomm 2nd generation CDMA CDMA2000 3G CDMA technology CDNU Control Display Navigation Unit CDR (1)Commander CDR (2)Command destruct receiver (Stratcom) CD-R Compact Disc - Recordable CDRAM Cache Dynamic Random Access Memory CD-ROM XA CD-ROM eXtended Architecture, extends the "Yellow Book" CD-ROM Compact Disc Read Only Memory CD-RTOS Compact Disc - Real Time Operating System (CD-I) CDS (1)Canadian Defence Staff CDS (2)Combat Direction System CDT Central (US) Daylight Time CDU Control display unit (fancy "control head") CE (1)Conformite Europeanne (European Conformity); mark put on products for EEC CE (2)Committee that sets these requirements CEC (1)Commission of the European Communities (drafts "CE" standards) CEC (2)Cooperative Engagement Capability CECOM US Army Communications Electronics Command CENTCOM U.S. Central Command CEOI Communications -Electronics Operation Instructions CEP (1)Central East Pacific (MWARA) CEP (2)Circular Error Probability CEP (3)Circular Error Probable CEPPO Chemical Emergency Preparedness and Prevention Office CEPT Conference of Postal & Telecommunicatio ns Administrations (EU) CEPTAG Civil Emergency Planning Telecommunications Advisory Group (Joint US/Canadian) CERDEC Communications Electronics Research, Development and Engineering Center CERN Centre Europ'eene por la Recherche Nucleaire, Center for European Nuclear Research, huge particle accelerator center, WWW originated there CERT Computer Emergency Response Team (Internet security) CF (1)Canadian forces CF (2)Center frequency CFAP Commandement Force Aerienne de Projection (French AF) CFARS Canadian Forces Affiliate Radio System CFB Canadian Forces Base CFBL Call Forwarding Busing Line (telco) CFBS Canadian Forces Broadcasting Service CFDA Call Forwarding Don't Answer (telco) CFEP Communications front end processor CFL Confidential Frequency List (good shortwave publication) CFM Cubic feet per minute

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CFR CFR CFR CFR CFS CFS CFT CG CG CG CGAS CG-C2 CGCWOA CGDN CGM CGM CGMS CGSIC CGU Ch mkr Ch CHAP CHATH CHBDL

33: USCG Navigation Regulations 46: USCG Vessel Regulations 47: FCC Regulations Code of Federal Regulations (1)Center for Standards (2)Canadian Forces Station Center Frequency Tone (1)Coast Guard (2)Commanding General cloud-ground lightning Coast Guard Air Station Coast Guard Command & Control (US) Coast Guard CW Operators Assn. (see CW) Coast Guard Data Net (1)Computer Graphics Metafile (2)Corrected Geomagnetic coordinates Coordinating Group for Meteorological Satellites Civil GPS Service Interface Committee Canadian Geophysical Union Channel marker Channel Challenge Handshake Authentication Protocol (PPP) Chemically/Bio logically Hardened Air Transportable Hospital Common High Bandwidth Data Link

CHBDL-ST Complementary Common Heterostructure High Bandwidth Field Data Link-Surface Terminal C-HFET Effect Transistor CHI cloud-height indicator CHINO sky condition at secondary location not available CHOP (1)Change in Operational Control CHOP (2)Chief Operator (Navy MARS) CHOP (3)Counter Measures Hands-on Program CHS Combat health support CHS Cylinder, Head, Sector (direct disk addressing) CIA Central Intelligence Agency (US) CIBAR Conference of International Broadcasters' Audience Research Services CIC (1) Combat Information Center (Navy) CIC (2) Combined Intelligence Center (US Air Force) CIC (3)Combined Intelligence Center CICA Competition in Contracting Act CICBMs Conventionally -armed ICBMs CICS Customer Information Control System (IBM) CID (1)Circuit Identifier CID (2)Combat Identification CIDE Communication Information Data Exchange CIDR Classless Inter-Domain Routing (Internet, replaces class A-C) CIDX Canadian International DX Club CIG ceiling CIIP Common Imagery Interoperabilit y Profiles CIJ Close In Jamming CIL Command Image Library CINC Commander In Chief, replaced by CDR 2003 CINCLANT C in C, Atlantic, obsolete CINCNORAD C in C, NORAD, obsolete CINCPAC C in C, Pacific, obsolete CINCSTRAT C in C, Stratcom, obsolete CIOL CIPO CIPSO CIRC CIRAF CIRF CIS CIS CISC CISCO CISPR CIT CITS CI-V CIW CIWS CJCS CJCSI CJCSM CJFET CJMAO CK CL CL Class Class Class Class Class Class Class

A A B C C D E

Common Interface Objects Language Commanders in chief Interoperability Program Office Common Internet Protocol Security Options Cross Interleaved Reed Solomon Code French acronym for international broadcast zone system Co-Channel Interference Reduction Factor (1)Combat Intelligence System (2)Commonwealt h of Independent States (replaced USSR) Complex Instruction Set Computing Consolidated intelligence support to combat operations International Special Committee on Radio Interference California Institute of Technology (CalTech) Combat Information Transfer System Radio computer interface made by Icom Combined Intelligence Watch Close-In Weapons System Chairman, Joint Chiefs of Staff (US) Chairman of the Joint Chiefs of Staff Instruction Chairman of the Joint Chiefs of Staff Memo Complementary junction field effect transistor Central Joint Mortuary Affairs Office Check (usually word count in a message) (1)Centerline Lighting System (2)CW prosign: I am closing my station (clearing) (1)Stage is biased to conduct continuously (2)High explosive (military phone patches) Stage is biased to conduct on half of cycle (1)Stage is biased to conduct less than half (2)Gunpowder (military phone patches) Digital switching New, like D

CLC Circuit Clg Calling Link Control CLIPER CLImatology and PERsistence (weather model) CLOVER Robust RTTY mode for HF CLR (1)Clear CLR (2)Clear below 12,000 feet (automated METAR) CLR (3)Common Language Runtime (MickeySoft) CM (1)Countermeasures CM (2)Cipher Machine CM (3)Corrected Geomagnetic coordinates CM (4)Chemical Mace, a tear gas CM (5)Configurati on Management cm (1)Centimeter cm (2)Control monitor CMARS Cruise Missile Autonomous Routing System CMAS Cheyenne Mountain Air Station, was CMAFB, CMAFS CMAWS Common Missile Approach Warning System CMC (1)Cheyenne Mountain Complex (NORAD) CMC (2)Command management center CMC (3)COMSAT Mobile Corporation, part of COMSAT CMCS COMINT Mission Collection System CMD (1)Command CMD (2)Network Command (ALE) CMDR Commander CMDS Countermeasure Dispenser Set CME Coronal Mass Ejection, causes aurora CMF Combat Mission Folder CMI Computer-manag ed instruction CMIS (1)Cheyenne Mountain Interface Subsystem CMIS (2)Closed Loop Maintenance Information System CMLSA Commercial Microwave Landing System Avionics CMO (1)Central Measurement and Signature Intelligence (MASINT) Office CMO (2)Civil-milit ary operations CMOC Cheyenne Mountain Operations Center CMOS (1)Complementa ry Metallic Oxide Semiconductor CMOS (2)Cargo Movement Operations System CMP Common Management Practices CMR Crisis Management Reconnaissance CMRS Commercial Mobile Radio Service CMS (1)Canadian Maritime Service CMS (2)Calendar Messaging Service (Solaris) CMS (3)Common Mapping System

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CMS CMS CMS CMSA CMT CMU CMX CMY CMYK CN CN CNA CNAAS CNCE CNCS CNE CNE CNE CNES CNI CNM CNMI CNN CNO

(4)Community Management Staff (5)Counter Measures Set (6)Counter Measures System Cruise Missile Support Activity Cellular Mobile Telephone Cheyenne Mountain Upgrade Crisis Management Exercise (NATO) Cyan, Magenta, Yellow (subtractive color printing) Cyan, Magenta, Yellow, blacK (4-color printing) (1)Communicati ons network (2)Counter-narcotics Center for Naval Analysis Counter-narcot ics air analysis system Communications nodal control element Centralized Net Control Station (Scope Command hub at Andrews AFB) (1)Communicati ons Network Environment (2)Communicati ons Node Emulator (3)Certified Netware Engineer (Novell) Centre National d'Etudes Spatiales (French space agency) Communications , Navigation, and ID (1)Communicati ons Network management Commonwealth of the Northern Mariana Islands Cable News Network (1)Chief of Naval Operations

CNO (2)Casualty notification officer CNR Combat Net Radio CNRADL Canadian RADIL (ROCC/AWACS digital information link) CNS (1)Communicati ons, navigation & surveillance CNS (2)Central nervous system CNS (3)Consolidate d NOTAM System (Another nested acronym courtesy FAA) CNTRA Chief of Naval Air Training (pronounced "Sinatra" like the singer) CO (1)Commanding Officer CO (2)Central Office (telcom) CO (3)Contracting Officer co UK version of .com (Internet domain) CO/MIS Commander, Management Information Center COA Courses of Action Coax Coaxial cable COBOL Common Business Oriented Language (clunky old programming code) COBRA DANE US military air surveillance radar system COBRA (1)Coastal Battlefield Reconnaissance System COBRA (2)Counter Battery Radar COBRA (3)Coaxial Beam Rotating Antenna COCOM Combatant command COD (1)Carrier Onboard Delivery COD (2)Collect On Delivery CODAR Coastal Ocean Dynamics Radar CoDE Coherent Digital Exciter Codec Coder/Decoder COE (1)Circle of Error COE (2)Common Operating Environment COE (3)Central Office Equipment COFAS Commandement Force Aerienne Strategique (French AF) COFC Container On Flat Car (as opposed to container car) COFF Common Object File Format (Windoze) CofS Chief of Staff COG Continuity Of Government (emergency plan) COI Critical Operational Issue COIL Chemical Oxygen-Iodine Laser COL Colonel COM (1)Computer file extension: load as simple command program COM (2)Commercial domain (Internet) COM (3)Component Object Module (Windoze) COMACC Commander, Air Combat Command COMAFFOR Commander Air Force Forces COMAFSPACE Commander, Air Force Space Command COMARSPACE Commander, U.S. Army Space Command COMASWFORLANT Commander, ASW Forces Atlantic COMCON Communications Condition (MARS) COMFAIRMED Commander, Fleet Air Mediterranean COMFAIRWINGTEN Commander, Fleet Airwing Ten COMHSWINGONE Commander, Helicopter Antisubmarine Wing One COMINT Communications Intelligence COMJAM Communications jamming COMM Communications Comm Communications (also "commo") COMMSTA Communication Station COMMZ Communications zone COMNAVCOMTELCOM Commander, Naval Computer and Telecommunications Command COMOPTEVFOR Commander, Operational Test and Evaluation Force COMPATWING Commander, Patrol Wing COMPATWINGSLANT Commander, Patrol Wings Atlantic COMPUINT Computer intelligence Compul Compulsory COMPUSEC Computer Security COMSAT (1)COMmunicati on SATellite COMSAT (2)Comsat Corp., USSea-Based consortium & INMARSAT Convention rep COMSEABASED Commander, ASW Wings, Atlantic COMSEC Communication Security COMSTAT Communications Status Report COMSUBLANT Commander, Submarine Forces, Atlantic (USN) COMSUBPAC Commander, Submarine Forces, Pacific (USN) COMTAC Communications Tactical CONCISE Cosine Network's Central Information Service for Europe CONDX CW brevity: propagation conditions (usually wretched) CONELRAD Control of Electromagneti c Radiation, obsolete Config Configuration, configure conmara Italian Consulate, Maracaibo, Venezuela conmars Italian Consulate, Marseille, France conmopr Italian Consulate, possibly Montpellier, France conmpla Italian Consulate, Mar del Plata, Argentina CONOP(s) Concept of Operations(s) CONS continuous conspie Italian Consulate, possibly St. Pierre contolo Italian Consulate, Toulouse, France CONUS continental United States conwett Italian Consulate, Wettingen, Switzerland COOP Continuity Of Operations (US Army) Coq Coquelet (French teleprinting system, after "Rooster") Coq8 8-bit Coquelet COR (1)Carrier operated relay COR (2)Consolidate d Operations Room ("Lights Out") COR (3)Correction to a previously disseminated weather report CORES Commission Registration System (FCC) COS Communication Operations Segment COSCOM Corps support command COSE Common Open Software Environment COSIP Computer Open System Interface Processor COSPAS Acronym for Russian SARSAT COT Changeover time COTHEN Customs Over The Horizon Enforcement Network (US) COTS Commercial Off-The-Shelf COWS Cells On Wheels (post-disaster cellphone service) CP (1)Command Post CP (2)CW general call: "Hello -- [2 or more callsigns follow]" CP (3)Contental Polar (air mass) CP/M Early Z80 operating system, might or might not have stood for "Control Program for Microcomputers, " or "Control Program/Monitor. " The guy who CPA (1)Closest Point of Approach

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CPA CPAS CPCA CPDLC CPE CPFSK CPM CPO CPR CPS CPS cps CPT CPU CPX CQ CQD CQWW CR CRAF CRATT CRC CRC CRC

(2)Certified Public Accountant Cellular Priority Access Service Camp Parks Communications Annex (USAF) Controller-Pil ot Data Link Communications Customer Premise Equipment (telco) Continuous-Pha se Frequency Shift Keying Continuous Phase Modulation Chief Petty Officer Cardio-pulmona ry resuscitation (1)Characters Per Second (2)Cellular Priority Services (US NCS) Cycle per second (one Hertz) Captain (US Army) Central Processing Unit (computer h/w) Command Post Exercise (NATO) General call: "Hello all stations" "Hello All Stations, Distress," no longer used CQ World Wide (Amateur DX contest) Carriage Return Civil Reserve Air Fleet Crypto Radio Teletype (usually military & encrypted) (1)Cyclic Redundancy Check (computer error test) (2)CONUS Replacement Center (3)Control & Reporting Center

CRE Control & Reporting Element CREN Corporation for Research and Educational Networking CRIS Communications Resource Information Sharing (US NCS) CRM Computer Resource Management CRO (1)Cathode-Ray Oscilloscope CRO (2)Croatia (country code) CRO (3)Coaxial Resonator Oscillator CROSS Centres Regionaux Opérationnels de Surveillance et de Sauvetage (French RCC, see RCC) CRPLF French language: Francophonic Public Radio Community CRR Carrier CRRL Canadian Radio Relay League CRS Coastal Radio Station CRT Cathode-Ray Tube (usually a computer terminal) CRTC Combat Readiness Training Center CS (1)combat support CS (2)communicati on squadron CS (3)Chicken S-it CS (4)Chemical Shield (a tear gas) CSAF Air Force Chief of Staff CSAR Combat Search and Rescue CSARP Common SAR Processor CSB Corps support battalion CSC (1)Combat Support Center (AFOC) CSC (2)Combat stress control CSC (3)Computer Software Component CSCI Computer Software Configuration Item CSE Client/Server Environment CSEL Combat Survivor Evader Locator (pilot survival radio) CSG (1)Carrier Strike Group CSG (2)Corps support group CSH Combat support hospital csh C-shell, popular Unix command CSMA/CD Carrier Sense Multiple Access/ interpreter Collision Detection CSOM Computer Software Operators Manual CSP Communications Support Processor C-SPAN Cable-Satellit e Public Affairs Network (US) CSS (1)Combat service support CSS (2)Central Security Service (US SIGINT, run by NSA director) CSS (3)Cascading Style Sheets CSS (4)Content Scrambling System (DVD encryption) CSSCS Combat Service Support Control System CST (1)Central (US) Standard Time CST (2)Caribbean Support Tender CST (3)Civil Support Team CSTARS COMBAT SENT Technical Acquisition Receiver System CSU Computer Software Unit CT (1)Center Tap CT (2)("Charlie Tango") - Communications Technician (on an aircraft) CTA Control Area CTAF Common Traffic Advisory Frequency CTAPS Contingency Tactical Air Combat System CTBT Comprehensive Test Ban Treaty CTC Centralized Traffic Control (railroad) CTCSS Continuous Tone Coded Squelch System ("PL") CTI Computer - Telephone Integration CTIA Cellular Telecommunicatio ns Industry Assn CTLZ Control Zone CTP Critical Technical Parameter CTR Combat Training Range Ctrl (1)Control Ctrl (2)Computer's control key, sometimes shown with a ^ CTS Clear To Send (Serial I/O handshaking line) CTT CU CUAGN CUBIC CUCV CUL CV CV CVBG CVIC CVN CW CW CW CWDE CWIS CWISP CWOC CWP CWS Cygnus CZ D D D/A D/L D/L D2 D2C D3 D4 D4 D4EN DA DA DA-2 DAC DAC DAC DACT DAE DAGS

Commander's Tactical CW brevity code: "SeeTerminal you" CW brevity code: "See you again" Common User Baseline for the Intel Community commercial utility cargo vehicle CW brevity code: "See you later" (1)USN Aircraft Carrier (2)Vice Commander Carrier Battle Group Carrier Intelligence Center US nuclear aircraft carrier (1)Continuous Wave (usually Morse code) (2)Clockwise (rotation) (3)Composite Wing Chemical Warfare Defense Ensemble Campus-Wide Information System Campus-Wide Information System Protocol Composite Wing Operations Center Central West Pacific (MWARA) Combat Weather System Cygnus, Your Gnu Support (nested recursion; see Gnu) (Panama) Canal Zone (1)Down (2)Diode Digital/Analog converter (1)Downlink (2)Download Degrade and Destroy D-2 Small Cassette Degrade Disrupt Deny (1)Degrade Disrupt Deny Destroy (2)Deny, Disrupt, Degrade, & Destroy Disrupt, Delay, Destroy, Exploit, or Neutralize (1)Directional antenna (2)Department of the Army Station changes directional pattern at night (FCC) (1)Digital-to- Analog Converter (2)Disaster Assistance Center (FEMA) (3)Disaster Application Center Data Automated Control Terminal Disaster Assistance Employee Data Architecture and Gateway Services

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dah DAMA D-AMPS DAMSON DAQCS DAQCS DARN DARN DARO DARP DARPA DARTS DAS DASR DAT DAWS DB DB dB dBA dBc DBCS dBd dBi

Morse code dash [~] Demand Assigned Multiple Access Digital Advanced Mobile Phone System Doppler And Multipath Sounding Network (1)Distress Alert Quality Control System (2)Data Acquisition and Quality Control System (1)Dual Auroral Radar Network (2)Disaster Amateur Radio Network, SoCal 440 MHz system Defense Airborne Reconnaissance Office Defense Airborne Reconnaissance Program Defense Advanced Research Projects Agency Dynamic Avionics Real-Time Scheduling Data Aquisition System Digital Airport Surveillance Radar Digital audio tape Defense Automated Warning System (1)Directional Beacon (2)Dead body Decibel (1/10 Bel, a logarithmic voltage or power ratio) Sound level (corrected to "A" scale dB) Decibels referenced to full-rated peak envelope power Double byte character set Decibel gain over dipole antenna Decibel gain over (theoretical) isotropic antenna

dBic DBM DBM dBm DBMS DBPSK DBS dBW DC DC1 DC2 DC3 DC4 DCA DCA DCA DCAC DCD DCDR DCE DCE DCG DCI DCI DCID DCO DCOM DCP DCP DCPA DCR

Db gain over circular isotropic (1)Doubly balanced mixer (2)Data Block Message Decibels over 1 mW into 50 ohms, usually rf, 0 dBm = 0.316 Vp Data Base Management System Differential Binary Phase-Shift Keying Direct broadcasting satellite (system) Db over one watt Direct Current Device Control 1 (ASCII flow control) Device Control 2 (ASCII) Device Control 3 (ASCII flow control) Device Control 4 (ASCII) (1)Defense Communications Agency (now DISA) (2)Defensive counter Air (3)Dual-Capabl e Aircraft Defense Communications Agency Circular (now DISA) Data Carrier Detect (packet modems) Deputy Commander (1)Data Communication Equipment (like a modem) (2)Distributed Computing Environment Deputy commanding general (1)Defensive Counter Information (2)Director of Central Intelligence Director of Central Intelligence Directive Defense Coordinating Officer Distributed Component Object Model (Windoze) (1)Data Collection Platform (2)Defense Cryptologic Program Defense Civil Preparedness Agency, now FEMA Direct Conversion Receiver ("Homodyne")

DCS DCS DCS DCS DCT DCT DCTN DCW DD DDD DDDS DDM DDN DDNS DDO DDPO DDR DDRS DDR DDS DDS DDT DDT DE DEA DEC DECCA DECM DECnet DECT DEFCON

(1)Defense (2)Disaster Communications Communications System System, amateur, from RACES (3)Digital Coded Squelch (4)Distributed Control Systems (1)Digital Communications Terminal (2)Direct Cosine Transform Defense Commercial Telecommunicat ions Network Digital Chart of the World Dual Diversity Maritime preamble for relayed distress message Defense Data Dictionary System DoD Data Model Defense Data Network Dynamic Domain Naming System/Server (Internet) Dynamic Drive Overlay (used by Disk Manager on the PC) Defense Dissemination Program Office Dual Diversity Receiver Defense Data Repository System Double Data Rate (memory) (1)Direct Digital Synthesis (2)Defense Dissemination System (1)Delay/Denia l Technology (2)Dynamic Debugging Tool, named for old pesticide Morse code prosign meaning "from" Drug Enforcement Administration (US) Digital Equipment Corporation, made some nice computers Low-frequency CW phase comparison navigation Deceptive Electronic Countermeasures DEC's name for networking protocols and products Digital European Cordless Telecommunicati ons DEFense CONdition, 1-5; 5 is peace, 1 is global thermonuclear war (STRATCOM)

DEMIZ East Military DEPCON DEW Departure Control Identification Zone DE-QPSK Differentially Encoded Quaternary Phase Shift Keying DES Data Encryption Standard DES-FED Stronger (108 bit) DES used by US government Det Detector DEW Distant Early Warning (radar in Canada) DF (1)Direction finding DF (2)Direction finder ("duffer") DF (3)Damping Factor DFAD Digital Feature Analysis Data DFAS Defense Finance and Accounting Service DFCC Digital Flight Control Computer DFCS Digital Flight Control System DFCW Dual-Frequency Continuous Wave DFO Disaster Field Office DFRC Dryden Flight Research Center (NASA) DGM Digital group multiplexer DGPS-MSK Differential GPS, Minimum Shift Keying DGPS-QPSK DGPS-QPSK : Differential GPS, Quarternary Phase Shift DGS Deployable Ground Stations DHCP Dynamic Host Configuration Protocol DHS Department of Homeland Security DHTML Dynamic Hypertext Markup Language (web) DIA Defense Intelligence Agency DIAC Defense Intelligence Analysis Center DIAL Differential Absorption Lidar DIAM Defense Intelligence Agency Manual DICE Data Integration & Collection Environment DIDOP Digital Image Data Output Product Differential GPS, Quarternary Phase Shift Keying DIG DIGEST DIGI DII DIMM DIMMS DIN DIOP DIP Diplo DIPS

Domain Internet Groper Digital Geographic Information Exchange Standard ~ Digipeater, simplex digital repeater Defense Information Infrastructure Double In-line Memory Module Double In-line Modular Memory System German standards agency Data Input/Output Port Dual In-line Package (chips or small switches) Diplomatic traffic, usually encrypted Digital Image Processing System

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DIRCM Directed Infrared Countermeasures DIRMOBFOR Director of Mobility Forces DIS (1)Defense Investigative Service DIS (2)Distributed Interactive Simulation DIS (3)Distributed Interactive System DIS (4)Draft International Standard DIS (5)Daily Intelligence Summary DIS (6)Data and Information System DIS (7)Defense Information System DIS (8)Defense Intelligence Service DISA Defense Information Systems Agency DISAC Defense Information Systems Agency Circular DISC Packet control frame: Disconnect DISCO Defense Industri+al Security Clearance Office DISCOM Division support command DISN Defense Information Systems Network dit Morse code dot [~] DITAW Detect, Identify, Track, Assesment, & Warn DIW Dead in the water DIWSA Digital Imagery Workstation Suite Afloat DJ Deceptive Jamming DJBDNS Daniel J. Bernstein DNS (more secure than BIND) DL (1)Download DL (2)Data Link DL DLA DLC DLE DLL DLQ DLRP DM DM DMA DMA DMAAC DMAHC DMAHTC DMAL DMAT DMATC DMC DMCA DMD DME DMI DMSO DMSP DMSP DMT DMTD DMTF DMUX DMZ DN

(3)Driver's License (police) Defense Logistics Agency Data Link Control Data Link Escape (ASCII) Dynamically Linked Library (computer programs) Deck Landing Qualification Data Link Reference Point, a USN authenticator (1)Delay Modulation (Miller Coding) (2)Packet control frame: Disconnect Mode (busy) (1)Direct Memory Access (2)Defense Mapping Agency Defense Mapping Agency Aerospace Center Defense Mapping Agency Hydrographic Center DMA Hydrographic Topographic Center Defense Mapping Agency List Disaster Medical Assistance Team Defense Mapping Agency Topographic Center Defence Management Committee (Canada) Digital Millennium Copyright Act Digital Micromirror Device Distance Measuring Equipment (airport approach) Depot Maintenance Interservicing Defense Modeling and Simulation Office (1)Distributed Mail System Protocol (2)Defense Meteorological Satellite Program Discrete Multi-Tone Digital Message Transfer Device Distributed Management Task Force Demultiplexer Demilitarized Zone (Korea) (1)Dutch (Royal) Navy

DN DNC DNCC DND DNS DNSSEC DO DOA DOB DOC DOC DoD DoDD DoDIIS DoDIIS DODISS DoDISS DoDSI DoDSSP DOE DOI DOJ DOMS DOS DOS DOS DOS DOS DOT DOW DP

(2)Directory Number (telco) Digital Nautical Chart Deployed Network Control Center Department of National Defence (Canada) Domain Naming System/Server (Internet) DNS Security design objective Dead On Arrival Date Of Birth (police) (1)Department of Commerce (US) (2)Department Of Communication (Canadian "FCC") Department of Defense (US) Department of Defense Directive (1)Defense Intelligence Information System (2)DOD Intelligence Information System (3)Department of Defense Index of Specifications and Standards (4)DoD Index of Specifications and Standards Department of Defense Security Institute DoD Single Stock Point Department Of Energy (US) Department Of the Interior (US) Department Of Justice (US) Director Of Military Support (MARS) (1)Department of State (US) (2)Disk Operating System (generic) (3)MS-DOS (proprietary PC op-sys) (4)PC-DOS, IBM version of above, obsolete? (5)Denial of Service (attack) Department of Transportation (US) Doppler On Wheels (storm chasing radar equipment) Development Prototype

DPCA DPCM DPDT DPG DPL DPSK DPST dpx DQPSK DR DRAC DRAM DRE DRFM DRFMU DRM DRM DRO DRS DRSN DS DS DSA DSA/SMC DSB DSC DSI DSL DSLAM DSM DSN

Displaced Phase Center Differential Pulse Code Antenna Modulation Double-Pole, Double Throw Defense Planning Guidance Diode-Pumped Laser Differential Phase-Shift Keying Double-Pole, Single-Throw Duplex Differential Quadrature Phase-Shift Keying low drifting Dynamic Relay Authorisation Control Dynamic Random Access Memory Drug Recognition Expert Digital Radio Frequency Memory Digital Radio Frequency Memory Unit (1)Digital Radio Mondiale (2)Digital Rights Management Dielectric Resonator Oscillator Deployable Red Switch Defense RED Switch Network (1)Direct support (2)Dust storm Division support area Deputy for Systems Acquisition/Systems Management Center Double sideband Digital Selective Calling (GMDSS) Defensive Simulation Internet Digital Subscriber Line Digital Subscriber Line Access Multiplexer Digital Switching Module Defense Switched Network (old AUTOVON)

DSNET DSNT DSOR DSP DSR DSRC DSS Dst DSTO DSVD DSVT

Defense distant Secure Network Depot Source of Repair Digital signal processing Data Set Ready (Serial I/O primary handshaking line) Dedicated Short Range Communications Digital Satellite System Disturbance Storm Time, equatorial magnetospheric activity index Defence Science & Technology Organisation (Australia) Digital Simultaneous Voice and Data Digital Subscriber Voice Terminal

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DSW DT DTAC DTC DTD DTE DTED DTG DTIM DTM DTM DTM DTMF DTMF-RA DTO DTOP DTR DTS DTS DTS DTSS DTT DTV DU

Russian CW brevity code: "Daswedanya" (Goodbye) (1)District T (USCG) Division tactical command post Design to Cost Data Transfer Device Data Terminal Equipment (computers, workstations, dumb terminals) Digital Terrain Elevation Data Date time group (typically ddhhmm mon yy tz) Delivery Traffic Indication Message (1)Data Text Message (2)Data Transfer Module (3)Digital Technology Model Dual Tone Multi Frequency (like telco "touch tone") Dual Tone Multi-Frequency - Remote Access Division tactical operations center Digital Topographic Data Data Terminal Ready (Serial I/O primary handshaking line) (1)Digital Transmission System (Euro radio e-mail s/w) (2)Data Terminal Set (3)Digital Terrain System Digital Terrain Support System Digital Terrestrial Television Digital television (1)widespread dust (weather)

DU DUATS DUP-ARQ DUPE DUSD DUT1 DV DVA DVD DVFR DVI DVM DVMT DVP DVP DW DX DX DX DXAC DXCC DXing DZ DZ DZST E E E E EA EA

(2)depleted uranium Terminal System Direct User Access Hungarian diplomatic teleprinting system CW prosign: message or contact is a duplicate Deputy Undersecretary of Defense UTC correction interval to get UT1 Distinguished Visitor Department of Veterans Administration Digital Versatile Disk Defense Visual Flight Rules Digital Video Interface Digital Voltmeter Dynamic Video Memory Technology (1)Distinguish ed Visitor Protocol (US Air Force (2)Digital Voice Protection (Motorola DES mode) Deutsche Welle (1)Distant Transmitter. The distance can be either geographic or psychological. (2)First transmission of FEC character (3)Duplex DX Advisory Committee (ARRL) Coveted amateur radio award, for confirming at least 100 countries The hobby of listening to distant radio or television (1)Drop zone (2)drizzle Drop Zone Support Team (1)Electromoti ve force (in volts) (2)east, ended (3)E-region (middle zone of ionosphere) (4)Electric field (1)East Asia (MWARA) (2)Electronic Attack

EAC EAD EAF EALS EAM EARN EAS EAS EAS EBB EBC EBCDIC EBIOS EBONE EBS EBU EC EC ECB ECC ECC ECC ECCM ECCO ECDIS ECDIS-N ECHS ECM ECM ECOM ECRS

Echelons Echelons above above corps division Expeditionary Airfields Emergency Airfield Lighting System Emergency Action Message European Academic and Research Network (1)Emergency Alerting System, replaced EBS (2)Equivalent Air Speed (3)Electronic Article Surveillance Electronic bulletin board Emulated buffer computer Extended Binary Coded Decimal Interchange Code, old IBM Enhanced Basic Input/Output System (PCs with disks over 540 meg) A pan-European Backbone service Emergency Broadcasting System, replaced CONELRAD European Broadcasting Union (1)Electronic Combat (2)Emergency Coordinator Echelons corps and below (1)Error Correction Code (better than parity) (2)Error Checking & Correcting (memory chip) (3)Error Control Coding Electronic Counter-Counterme asures Electronic Combat Coordination Officer Electronic Chart Display and Information System Electronic Chart Display and Information System-Navy Extended Cylinder, Head, Sector (addressing) (1)Electronic countermeasures (2)Electronic Cipher Machine Emergency Communications East Coast Radar System

ed Edit; of several EDC Error any Detection Code funky line editors for old printing TTYs connected to computers EDD Electronic Document Delivery EDFMCM Environmental Data Fusion for Mine Countermeasure s EDGE Enhanced Data Rates for Global Evolution (telephony) EDI Electronic Document Interchange EDO Extended Data Output (memory chip) EDP Electronic Data Processing EDPT Enhanced (fixed) Disk Parameter Table EDR Enhanced Data Rate EDS Explosives Detection Systems EDSAC Electronic Delay Storage Automatic Calculator (1949) EDT Eastern (US) Daylight Time edu Educational Institution domain (Internet) EDVAC Electronic Discrete Variable Computer (1945) EE (1) Transmission is in English EE (2) Person with Electrical Engineering degree EEC European Economic Community EECEN Electronics Engineering Center, NJ (USCG) EEFI Essential Elements of Friendly Information (COMSEC) EEFI 1 Position (notification prepended by ZNX) EEFI 2 Capabilities EEFI 3 Operations EEFI 4 Electronic Warfare EEFI 5 Personnel EEFI 6 COMSEC breach EEFI 7 Wrong circuit used EEFI 8-10 Spare EEI Essential Elements of Information (Federal report form) EEJ Equatorial Electrojet, might cause trans-eq spread-f propagation EEPROM Electronically Erasable Programmable Read Only Memory EEZ EFAS EFF EFFI EFTO EGC EGP EGPRS EGS E-HA EHS

Exclusive Economic Zone Service ("200-mile limit") Enroute Flight Advisory Electronic Frontier Foundation, Internet free speech group Essential Elements of Friendly Information Encrypted for transmission only Enhanced Group Call (GMDSS) Exterior Gateway Protocols Enhanced General Packet Radio Service European Geophysical Society Enroute High Altitude External Hostile Structured threat

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EHU External Hostile Unstructured threat EI-232 Latest name for RS-232, the serial interface standard EIA (1)Electronic Industries Association, replaced RETMA EIA (2)Equatorial Ionization Anomaly EICC Emergency Information and Coordination Center (FEMA) EIDE Enhanced Integrated Drive Electronics, ATA version once proprietary to WD EIG External Interface Gateways EINE EINE Is Not Emacs (recursive acronym; see Emacs) EIP ELINT Improvement Program EIRP Equivalent Isotropically Radiated Power EIS Enhanced Imaging System EISA Extended Industry Standard Architecture EISCAT European Incoherent Scatter Radar (research) E-LA Enroute Low Altitude ELF (1) Extremely Low Frequency (30-300 Hz) ELF (2) US military comm system using same ("Project Elf") ELINT Electronic Intelligence elm ELectronic Mailer (Unix) ELSEC Electronic Security ELT Emergency Locator Transmitter ELV Expendable Launch Vehicle EM (1)Electromagnetic EM (2)Extended mission EM (3)Emergency management EM Emacs E-mail EMC EMCON EMCON EMCS EME EME EMF EMI EMP EMS EMS EMSEC EMT EMWIN ENE ENF engr ENIAC ENIGMA ENIGMA ENJEP ENQ ENQ ENS ENTNAC ENU EO EO/IR

(4)End of Medium powerful (ASCII) if ungainly, Unix text editor Editing Macros, Electronic mail, usually by computer Electromagneti c compatibility (1)Electromagn etic Radiation Control (2)Emission Control (radio, etc, not smog) ELINT Mission Control System (1)Electromagn etic energy (2)Earth-Moon- Earth (VHF/UHF "moonbounce") Electromotive force (back-EMF occurs in coils & motors) Electromagneti c incompatibilit y Electromagneti c pulse (1)Extended Memory Specification (IBM PC, old LIM spec) (2)Emergency Medical Services Emanations Security Emergency Medical Technician, public safety certificate Emergency Manager's Weather Information Center East-northeast ELINT Notation File engineer Electronic Numerical Integrator And Computer, 1940s vacuum tube calculating machine (1) European Numbers Information Gathering & Monitoring Assn (2)[~]Historic German crypto machine, WW II code broken by Allies Euro-Nato Jet Pilot Training (at Sheppard AFB) (1)Enquiry, sent by computer to get ACK/NAK response (ASCII 05) (2)Enquiry (Like Who Are You?) External Non-Hostile Structured threat Entrance National Agency Check External Non-Hostile Unstructured threat Electro-Optical Electro-Optical/Infrared

EOB Electronic Order of Battle EOC Emergency Operations Center EOD Explosive Ordnance Disposal, the bomb squad EOL End of (design) life EO-LOROPS Electro-Optica l Long Range Oblique Photography System EOP Emergency Operations Plan EOS Earth Observing System EOT (1)End Of Transmission EOT (2)End Of Tape EOW End Of Watch EP Electronic Protection EPA Environmental Protection Agency EPIC El Paso Intelligence Center (US Customs) EPIRB Emergency Position Indicating Radio Beacon EPL ELINT Parameter List EPLRS Enhanced Position Location Reporting System EPROM Electrically Programmable Read-Only Memory EPS (1)Emergency Planning Subcommittee EPS (2)Enhanced Processing Segment EPS (3)GOES Energetic Particle Sensor, measures solar flares EPU Emergency Power Unit EPW Enemy prisoner of war ER (1)Eastern Range ER (2)Emergency room ERASER Enhanced Recognition & Sensing Radar ERFAK Emergency Response Fly-Away Kit (US Govt) ERLink Emergency Response Link (US Govt) ERMA Electronic Recording Machine Accounting (1959, first check reader) erp Effective radiated power ERPS External Frequency Interference Protection System ERT Emergency Response Team (FEMA) ERT-A ERTS ES ES ES ESA ESC ESC ESE ESF ESM ESMC ESMTP ESN ESS ESS EST EST ET ET ET ETA ETB ETD ETD ETD ETLA ETOH ETRAC ETSI ETX

Advance Element Time of the Emergency Team (FEMA) actual position in space Earth Rotation Service, keepsResponse track of planet's (1)Electronic Support (2)CW brevity code: "And" (3)Sporadic E propagation, or clouds making same European Space Agency (1)Enhanced Satellite Capability (US NCS) (2)Escape (computer character) East-southeast Emergency Support Function (part of NTSP; 1-12) Electronic Support Measures Eastern Space & Missile Center Extended Simple Mail Transfer Protocol (does this mean it's no longer simple?) Electronic Serial Number (1)Electronic Switching System (landlines) (2)Electronic Scoring Site (1)Eastern (US) Standard Time (2)Emergency Support Team (FEMA) (1)Extra-terrestrial (2)External Tank (NASA) (3)Eastern Time (US) Estimated time of arrival End of Transmission Block (1)Estimated time of departure (2)End-of-Trai n Device (3)Explosives Trace Detection Extended Three-Letter Acronym (a four-letter acronym) Alcohol (for some reason, paramedics say the chemical name) Enhanced Tactical Radar Correlator European Telecommunicatio ns Standards Institute End Of Text (ASCII)

EUCOM Eunet EUR EUV EVS EW EWIR EWMS EWN EWO EWO

European Command part of UUCP, Unix file transfer network Europe (MWARA) Extreme ultraviolet (can ionize) Electro-Optica l Viewing System Electronic warfare Electronic Warfare Integrated Reprogramming Electronic Warfare Management System Evangelical World Network, operates WEWN (1)Electronic Warfare Officer (backseater) (2)Emergency War Order

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EWPE EWR EWS EXE EXE2BIN f F F F1 F1 F2 F/B F/O F/O F/V F/W F0 F1B F2B F3C F3E FAA FAA FAAA

EW Processing Element Early Warning Radar Early Warning System Computer file extension: loads as executable PC program for creating .COM files from .EXE Frequency (in Hertz) (1)Farad (a huge capacitor; usually uf or pf) (2)F-region, highest zone of ionosphere (1)In daytime, lower layer of F region (2)Frequency number one (F2, F3...) In daytime, upper layer of F region Front to back ratio (antennas) (1)Fiber optics (2)Follow-on Fishing Vessel Fixed wing (airplane) FM carrier, no modulation, sounds just like A0, now N0N Mode designator: frequency shift keying Mode designator: Audio frequency-shift keying Mode designator: fax Mode designator: FM voice or broadcasting (1)Federal Aviation Administration (US) (2)Foreign Assistance Act General call: "All French warships" [~]

FAADC3 FAC FAC FACSFAC FADEC FAE FAF FAF FAGDS FAI FAM FAPSI FAQ FAR FARP FAS FAS FASC FAST FAST FAST FAST FAT FAT FAT32 FAX FB FBI FBO FC FCC

Forward Area Air Defense Command, Control, Communications Intelligence System (US Army) (1)Field-Align ed Current, an irregular propagation mode (2)Forward Air Controller Fleet Area Control & Surveillance Facility (US Navy) Full Authority Digital Engine Control Fuel Air Explosive (1)Fast Access Format (2)French Air Force Federation of Astronomical and Geophysical Data Services Field-Aligned Irregularities, like FAC Federal Air Marshal Federal Agcy for Govt Comm & Info (Russian, replaced KGB) Frequently Asked Questions (Internet/USEN ET) Federal Aviation Regulations Forward Arming & Refueling Point (1)Frequency Assignment Subcommittee (of IRAC) (2)Federation of American Scientists Forward area signal center (1)Field Assessment Team (FEMA) (2)Fleet Antiterrorist Strike Team (US Marines) (3)Fast Auroral Snapshot Small Explorer satellite (NASA) Field Adaptable Systems Technology (1)File Allocation Table (MS-DOS) (2)First Article Test 32-bit File Allocation Table (Newer MS-Windows) Facsimile CW brevity code: "Fine Business" (really good) Federal Bureau of Investigation (US) Fixed Base Operator funnel cloud Federal Communications Commission

FCMP Fleet Composite Broadcast (USCG Honolulu) FCO Federal Coordinating Officer (FEMA) FD (1)Floppy Disk FD (2)Fixed Disk (confusing!) FDD Floppy Disk Drive FDDI Fibre Data Distribution Interface FDK Frequency-Diff erence Keying FDM Frequency-Divi sion Multiplex FDMA Frequency Division Multiple Access FDPT Fixed Disk Parameter Table FDX Full Duplex FEBA Far East Broadcasting Assn FEC Forward error correction teleprinter system FEC-A One-way traffic FEC teleprinter system FECC Federal Emergency Communications Coordinator FECTOR Teleprinting over radio, mode B FED-STD Federal Telecommunication Standard FEK Frequency Exchange Keying FEMA Federal Emergency Management Agency FEP (1)Front End Processor (computers) FEP (2)FLTSAT EHF Package (Navy) FET Field-effect transistor FEW Few clouds FF (1)French Forces FF (2)Transmissio n is in French FF (3)Formfeed (ASCII) FFH (1)Fast Frigate Helicopter FFH (2)Fast Frequency Hopping (spread spectrum scheme) FFHT-net Fast-Frequency -Hopping Training net FFRDC Federally Funded Research& Development Center (MITRE Corp.) FFT Fast Fourier transform FG (1)Foreign Government (Foxtrot Golf) FG (2)Fog FGS Federal German Ship FH Field hospital FHWA Federal Highway Administration (US) FI Field Investigation, Field Interview (police) FIA (1)Fibreoptic Industry Association (UK) FIA (2)Federation Internationale d'Automobile (Formula 1 racing) FIBI filed but impracticable to transmit FIFO First in, first out FIGS Figures case (Baudot upper case) figs figures follow FIM Flight Information Manual FINDS Flexible Information Dissemination System FIPS Federal Information Processing Standards FIR (1)Flight Information Region FIR (2)Finite Impulse Response FIRESCOPE Firefighting Resources of Southern California Organized for Potential Emergencies FIRRS FAAR/Iceland Air Defense Remote Rekeying System FIRST (1)Forum of Incident Response and Security Teams (computers) FIRST (2)first observation after a break in coverage at manual station FISIN Foreign Instrument Signals Intelligence FISINT Foreign Instrumentatio n Intelligence FIST Fleet Imagery Support Terminal (US Navy) FISTA Flying Infrared Signatures Technology Aircraft FITFEEL Fast Information Transfer For Extremely Errored Links FL (1)Flight level FL (2)Focal Length FLAK German: FLeigerAbwehrK annonen (anti-aircraft artillery) FLASER Forward Looking Infrared Laser Radar FLIP Flight Information Publication (US DoD) FLIR Forward infrared per second Flops Floating looking point operations FLOT Forward Line of Own Troops FLOTUS First Lady Of The United States (President's wife) FLR Forward looking radar FLT HICOM Fleet High Command, (US Navy) Flt (1)flight Flt (2)fleet (US Navy) FLTSAT Fleet Satellite, Navy comsat FLTSATCOM Fleet Satellite Communications (US Navy) FM (1)Frequency Modulation

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FM FM FM FM FMA-net FMH FMH-1 FMH-2 FMO FMOW FMP FMS FMT-net FN FNG FNPRM FOB FOB FOB FOD FOIA FOLDOC FORSCOM FORTRAN

(2)Field manual (3)("Foxtrot Mike") VHF FM (US Navy) (4)CW brevity: From (5)Field Meteorological Frequency Management A-net Federal Meteorological Handbook Federal Meteorological Handbook-1 Federal Meteorological Handbook No.2 Frequency Management Office FM Orderwire (US military) Fleet Modernization Program Foreign Military Sales Frequency Management Training net French Navy Friendly new guy/gal (possible security risk) Further Notice of Proposed Rule Making (FCC) (1)Field Operations Bureau (FCC) (2)Freight On Board (shipping regs) (3)"Fresh Off the Boat" (humorous) Foreign Object Damage Freedom of Information Act Free Online Dictionary Of Computing Forces Command Formula Translator (early IBM computer language)

FOSIC Fleet Ocean Surveillance Information FOT Optimum Traffic Frequency &(fq that will Center work most days of period) FOUO For Official Use Only FOV Field of View Foxes THE QUICK BROWN FOX... test [~] FPLMTS Future Public Land Mobile Telecommunications Systems FPM Fast Page Mode FPO Fleet Post Office Fq Frequency FQDN Fully Qualified Domain Name (Internet) FQPSK Filtered Quadrature Phase Shift Keying FR (1)Frequency Response FR (2)Final report FRA (1)Forward repair activities FRA (2)Federal Request for Assistance (FEMA) FRA (3)Fixed Radio Access FRCM Federal Regional Coordinating Manager (FEMA) Freq Frequency FRMR Packet control frame: Frame Reject FRN (1)FCC Registration Number FRN (2)Free Radio Network FROPA frontal passage FRP (1)Federal Response Plan (FEMA) FRP (2)Fleet Response Plan FRQ frequent FRS Family Radio Service FS File Separator (ASCII) FS-1037C Official Federal Telecom Glossary, replaced by ATIS FSB Forward support battalion FSBS (Consolidated) Fixed Submarine Broadcast System FSC Full Scope Command (USAF HF Phase II) FSD FSE FSF FSK FSL FSM FSOC FSP FSP FSP FSP FSRAM FSS FST FSTS FSU FT FT ft FTA FTAM FTG FTI FTP FTS FTW FU FUBAR FUD FV FVLF

Federal Security Director Fire support element Free Software Foundation Frequency-shif t keying Forecast Systems Laboratory Facility Status Message Fairchild Satellite Op Center, Fairchild AFB, WA (1)File Service protocol (Internet) (2)File Slurping Protocol (3)Flaky Stream Protocol (4)FTP's Sexy Partner Fast Static Random Access Memory Fixed-Satellit e Service Forward surgical team Federal Secure Telecommunicati ons System Former Soviet Union (1)Terminal Forecast (weather) (2)Feet foot F--- The Army File Transfer Access and Management F--- The Guard Fixed Target Indicator File Transfer Protocol Federal Telephone System F--- The World Smoke (from French) [Fouled] Up Beyond All Recognition Fear, Uncertainty, Doubt (computer marketing technique) Fishing Vessel Fixed, Very Low Frequency

FW FWA fwd FWE FWIW FWOC FY FYEO FYI FZ FZRANO G G G/T G1 G2 G3 G4 G5 G6 GA GA GaAs GaAsFET GACC GAFRAN GAK GALEX GaN Gantsec GAO

Fighter Wing (USAF) Fixed Wireless Access forward Fighter Wing Equivalent For What It's Worth Fleet Weather and Oceanographic Centre (UK) Fiscal Year For Your Eyes Only For your information freezing freezing rain sensor not available (1)Conductance , reciprocal of R, in mhos, ohm backwards (2)Gust "G over T", antenna gain divided by noise temperature Asst. Chief of staff, personnel (US Army) Asst. Chief of staff, intelligence (US Army) Asst. Chief of staff, operations and plans (US Army) Asst. Chief of staff, logistics (US Army) Asst. Chief of staff, civil affairs (US Army) Asst. Chief of staff, information mgmt. (US Army) (1)CW prosign: go ahead (2)CW brevity code: Good Afternoon Gallium Arsenide Gallium Arsenide Field Effect Transistor Geographic Area Coordination Centers (USFS) Stationary German Air Force Government Access to Key Galaxy Evolution Explorer (NASA) Gallium Nitride Greater Antilles Section (US military/federal, out of Puerto Rico) General Accounting Office (US Government)

GATM GATR GBDL GBI GBL Gbps GBR GBS GBS GCA GCAS

Global Air Traffic Management iver ground-to-air transmitter/rece Ground Based Data Link Ground-Based Interceptor Ground-Based Laser Gigabytes per second Ground Based Radar (1)Global Broadcast System (2)Ground Based Sensor Ground Controlled Approach Ground Collision Avoidance System

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GCBS GCC GCCS GCCS GCCS GCHQ GCMP GCN GCN GCSS GD GDIP GDO GDOC GDR GDSS GE GE GE GENSER GENSER GENTEL GEO GEODSS

Ground Control Bombing System Ground Component Commander (0)Two different systems: (1)Global Command Control System, obsolete US Air Force (2)Global Command & Control System, 1992 data network plan to replace WWMCCS computers Government Communication Headquarters ("G;" UK comint) Guam Composite Broadcast (obsolete USCG) (1)ground communications network (2)ground control network Global Combat Support System CW brevity: Good Day General Defense Intelligence Program Grid/Gate Dip Oscillator Geographical Display Operations Computer Ground Data Reduction Global Decision Support System (1)General Electric (2)CW brevity: Good Evening (3) Guerra Elettronica (Italian for Electronic Warfare) (1)General Security Regulations (2)general service General Telephone Company Geosynchronous Earth Orbit Ground-based electro-optical deep space surveillance

GEOS GEOS GEOS GEP GES GETS GFA GFAE GFDL GFE GFE GFI GFI GFM GFP GFP GMSK GG GHFS GHz GI GI GID GIF GIGO GIMP GIS GKS GLOB GLONASS GM

(1)Geodynamic ocean satellite (2)Geomagnetic experimental earth observation system (3)Graphic Environment Operating System Ground Entry Point Ground Earth Station Government Emergency Telecommunicati ons Service (US NCS) Graphical Area Forecast Government-fur nished aerospace equipment Geophysical Fluid Dynamics Laboratory (1)Government- furnished equipment (2)God-Furnish ed Equipment (ionosphere) (1)Government- furnished information (2)Ground Fault Interrupter Government-fur nished material (1)Government Furnished Property (2)Government- furnished part Gaussian Minimum Shift Keying Transmission is in German Global High Frequency System (US Air Force) GigaHertz (1)Government Issue (2)Old slang, from above: U.S. soldier Group Identification Graphics Interchange Format, first used on CompuServe Garbage In, Garbage Out; first rule of computing GNU Image Manipulation Program, a nested acronym Geographical Information System Graphical Kernel System Ground Loving Old B-----d (KC-135) Global Navigation Satellite System (Russian GPS) (1)CW brevity code: Good Morning

GM (2)General GM (3)General Motors Manager GM (4)Guided Missile GMDSS Global Maritime Distress & Safety System GMF (1)Ground Mobile Force GMF (2)Government Master File (frequencies) GMI General Military Intelligence GMRS General Mobile Radio System GMS Geostationary Meteorological Satellite (Japanese) GMT (1)Greenwich Mean Time (obsolete, still UK's name for standard time) GMT (2)Ground Moving Target GMTI Ground Moving Target Indication GNA Gulf News Agency GNC (1)guidance and navigation computer GNC (2)guidance, navigation and control gnd ground GNDCON Ground Control gnu Gnu's Not Unix, a freeware op-system (recursive acronym) GO General Officer GOA Gone on Arrival (police) GOES (1)Geosynchron ous Oceanic & Environmental Satellite GOES (2)Geostationa ry Operational Environmental Satellite GOGO government-own ed, government-oper ated GOJ Government of Japan GORIZONT Moscow State University Geostationary Monitor satellite GOSIP Government Open Systems Interconnection Profile (UK & US) GOTS Government-off-the-shelf gov Government site (Internet) GOWON Gulf Offshore Weather Observing. Network gp Group GPM Gallon(s) per minute GPO GPO GPR GPRS GPS GR GRADU GRC GRDCUS grep GRI grp GRT GS GS GS GS GS GSA GSAC GSC GSC GSCO GSD GSE GSF GSFC GSM GSMP GSO GSTS

(1)Government Printing (2)General Post Office Office (US) Ground Penetrating Radar General Packet Radio Service Global Positioning System Hail (from French) Gradual weather change General Radio Communications (AN/GRC-xxx) Gulf Range Drone Control Upgrade System Global Regular Expression, Print; Unix text search Group Repetition Interval (Loran) Group Gross register tonnage (1)General support (2)Group Separator (ASCII) (3)small hail and/or snow pellets (4)Ground Stop (5)Ground Station General Services Administration (US) Ground support associate contractor (1)Ground systems controller (2)Ground support contractor Ground systems control officer General support division Ground support equipment GPS support facility Goddard Space Flight Center, Greenbelt, MD Global System for Mobile communications General Switch Management Protocol Geostationary Satellite Orbit Ground-based surveillance and tracking system

G-SWF GTC GTK gTLD GTO GTO GTO GTOC G-TOR GTS GUI

Gradual Shortwave Club, Fadeout disturbance) Greek Telegraphy aka(ionospheric SV-CW-C GIMP Tool Kit, a deeply nested acronym generic top-level domain (1)geosynchron ous transfer orbit (2)fast car made by Ferrari ("Gran Turisimo Omologato") (3)not quite so fast car made by Pontiac Geosynchronous transfer orbit capability Golay Transmissions Over Radio (Kantronics version of PACTOR) Global Telecommunicati on System (WMO) Graphical User Interface

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GUID GVAR GW GW GW GWARC GWEN GWT H H h/w H24 HA HAARP HAAT HAC HAC HAC HAES HAF HAL HAL HAMP HAMS

Globally Unique Identifier GOES Variable (1)Gigawatt (2)CW brevity code: Good Evening (2)Ground wire General World Administrative Radio Conference Ground wave emergency network (VLF strategic net) Gross Weight Tonnage (1)Henry (unit of inductance) (2)Magnetic field Hardware All 24 hours; station operates continuously ("Hotel Alpha") human remains HF Active Auroral Research Program Height Above Average Terrain (1)higher authority communications(U SAF) (2)heading alignment circle (NASA) (3)Hughes Aircraft Company High Altitude ELINT System Headquarters Air Force (1)High-order Assembly Language (space shuttle computers); named for: (2)Heuristical ly programmed Algorithmic Computer (2001: A Space Odyssey) Horizontal Avionics Modernization Planning Hilltop Amateur Mastertie System; old, big SoCal 440 MHz system

HAR HARCO HARM HAS HASA HBD HBD HBI HBO HBS HBT HBT HC-ARQ HCI HCJB HCP HD HD HDB HDD HDD HDLC HDOP HDR HDS HDSL HDTV HDX HE HE HEAR

Highway Advisory Radio Harris Radio Company, makes HF setups High-Speed Anti-Radiation Missile Hardened Aircraft Shelter High Altitude SIGINT Architecture (1)Has Been Drinking (police) (2)Hot Box Detector (railroad) Horizontal Blanking Interval (TV) Home Box Office (TV network) Heart Beat Signal (Australian Internet) Heterojunction Bipolar Transistor Heterojunction Bipolar Transistor Hagelin-Crypto s simplex teleprinter system Human-Computer Interface Heralding Christ Jesus' Blessing (callsign) Health and comfort package (1)Hard Disk (2)High Density High-Density Bipolar (1)Hard Disk Drive (2)Heads Down Displays High-level Data Link Control, old synchronous computer protocol Horizontal Dilution of Precision (DGPS) High Data Rate Hard Disk Subsystem High-rate Digital Subscriber Line High-Definitio n Television Half-duplex (1)high energy (2)high explosive Hospital Emergency Alert Radio (SoCal)

HEMP HEMT HEMTT HEO HEO HEP HERE HERF Hertz HES HETS HETS Hex HF HFBC HFCC HFDL HFDLP HFDR HFDU HFGCS HFIA HFMOD HFNC HFNPDU HFO HFO HFS HFSWR HHS HHT

High-altitude mobility electromagnetic pulse High-electrontransfer Heavy expanded mobility tactical truck (1)high earth orbit (2)highly elliptical orbit Head End Power (railroad locomotives) Hazards of Electromagnetic Radiation to Equipment High-Energy RF (weapons) Unit of frequency, named for Heinrich Hertz, 1Hz=1 cps Hurricane Evacuation Study (1)heavy equipment transporter system (2)heterodynes [~] Hexadecimal number notation, base 16 High Frequency (3-30 MHz) High-Frequency broadcasting High-Frequency Coordination Conference High-Frequency Data Link, single-tone digital aero mode HF Data Link Protocol HF Data Radio HF Data Unit High Frequency Global Communication System (Scope Command) HF Industry Association Australian Defence Force High Frequency Modernisation Project HF Network Controller HFDL: High Frequency Network Protocol Data Unit (1)High-Freque ncy Oscillator (2)Honolulu Forecast Office Hierarchical File System High-Frequency Surface-Wave Radar (Dept. of) Health & Human Services (1)Hand-Held Terminal

HHT HI HICOM HIDAR HIFER Hi-fi HIPAS HIPPI HIRF HISCAT HITRON HIWAS HJ HK HKCC HKCR HKCU HKDD HKEY HKG HKLM HKTI HKU HM HMCS HMMWV HMS HND HNG HNG-FEC HNMP

(2)Hand-Held Tester CW brevity code: a laugh (all dits, easier to send than "HA") High Command net (US Navy) High Data Rate High-Frequency Experimental Radio (low-power ~13.5 MHz) High Fidelity (audio) High-Power Auroral Stimulation High Performance Parallel Interface High Intensity Radiation Fields High-latitude, High-altitude, High-power, High-frequency, High-performance, Heating and ionospheric Scatter facility (research) Helicopter Interdiction Tactical Squadron (US Coast Guard) Hazardous Inflight Weather Advisory Service ("Hotel Juliet") Hijack Handle Key (Windows registry) Handle Key, Current Configuration (Windows registry) Handle Key, Classes, Root (Windows registry) Handle Key, Current User (Windows registry) Handle Key, Dynamic Data (Windows registry) Handle to a KEY (Windows Registry) Hong Kong (old country code) Handle Key, Local Machine (Windows registry) Hong Kong Telecom International Handle Key, Users (Windows Registry) Her Majesty Her Majesty's Canadian Ship High mobility, multipurpose wheeled vehicle (hummvee) Her Majesty's Ship Honduras (country code) Hungary (country code) Hungarian diplo FEC teleprinting system HF Network Management Protocol

HNS HOLF HP HP hp Hpa HPC HPE HPG HPI HPM

Host nation Outlying support Landing Field Helicopter (1)High Pass (filter circuit) (2)Highway Patrol Horsepower Hectopascal Hydrometeorolo gical Prediction Center, MD CW brevity code: "Hope to..." Hardcopy Processor Group High-Priority Intercept (global HF comint system) High Power Microwave

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HPTS HQ HQAN HQDA HR hr HR HRC HRCS HRMP HRPT HRR hrs HRT HRT HRV HSAL HSFB HSI HSIP HSSP HST HST HT

High-Power Transmitting System (TACAMO) Headquarters HAVE QUICK A-Net Headquarters, Department of the Army High Resolution Hour Hybrid Receive Harmonically Related Carrier (CATV channel scheme) High Resolution Camera System HF Relay Management Protocol High Resolution Picture Transmissions High Resolution Radar Hours Hostage Rescue Team (FBI) Hrvatske Radio Televizije (Croatian) Croatia (country code) High Speed Algebraic Logic High Speed Fleet Broadcast Hyperspectral Imaging H Camera Sensor Improvement Program HF Station Status Protocol (1)Hawaiian Standard Time (2)Hubble Space Telescope (1)Handie-talk ie, a hand-held radio

HT (2)Horizontal Tab (ASCII) HTI (1)Haiti (country code) HTI (2)Hostile Target Identification HTML Hypertext Markup Language (world wide web) HTS High Temperature Superconducting HTTP HyperText Transmission Protocol (WWW) HTTPD HTTP Daemon (Unix) HTTP-NG HTTP Next Generation HTTPS (1)HTTP Server HTTPS (2)HTTP with Secure Sockets Layer HUD Heads-up Displays HULTEC Hull to Emitter Correlation HUMINT Human Intelligence (spies!) HVAR High-Velocity Aerial Rocket HW CW brevity code: "How do you copy me?" hx Signal is a harmonic HYDROLANT US warnings for Atlantic and east HYDROMET Hydro-Meterolo gical bulletin or warning HYDROPAC US warnings for Pacific Ocean and west Hyperfix Hyperbolic Radio Navigation System (proprietary name) HZ haze Hz Hertz (a "cycle per second") I (1)Current (in amperes, amps) I (2)Packet designator: information frame I (3)Italy (country code) I/O Input/Output (computers) i18n Alphabet scheme for multi-lingual computer programs [~] IA (1)Information Assurance IA (2)Italian Army IA (3)Short for IATSE, the movie/theatrica l production union IA (4)Information Attack IAAFA IAB IAC IADS IAEM IAF IAG IAGA IAIP IANA IAPS IARN IARP IARU IAS IAS IAS IATA IAU IAVTR IAW IBC IBC IBCT IBDL IBM IBM IBOC IC IC IC

Inter-American Air Forces Academy Internet Architecture Board International Analysis Code (weather codes FM-45, FM-46) Integrated Air Defense System International Association of Emergency Managers (was NCEM) Italian or Irish air force Imagery Analysis Group International Association of Geomagnetism and Aeronomy Information Analysis and Infrastructure Protection Internet Assigned Numbers Authority I Am Pretty Sure International Amateur Radio Network International Amateur Radio Permit (to operate overseas) International Amateur Radio Union (1)Image Access Service (2)Indicated Air Speed Intelligence Analysis System International Air Transport Association International Astronomical Union Integrated Audio Visual Transmitter/ Receiver In accordance with (1)Internation al Broadcast Center (Olympics) (2)Italian Broadcasting Corporation Initial Brigade Combat Teams Inter Battery Data Link (1)Internation al Business Machines (company) (2)de facto PC standard, though few are true blue In-band, on-channel (digital broadcasting) (1)Integrated circuit (chip) (2)Incident Command (3)Ice crystals

IC ICAO ICAP ICAS ICBM ICD ICE ICE ICM ICMP ICNIA ICNIS ICOM ICOM ICOM ICON ICP ICPO ICQ ICRC ICS ICSTIS ICW ID ID IDAS IDASS IDCP IDE IDE IDECM

(4)In-cloud lightning International Civil Aviation Organization Internet Calendar Access Protocol Intermittent Commercial and Amateur service (rating) Intercontinent al Ballistic Missile Interface Control Document (1)Immigration and Customs Enforcement (2)Intrusion Countermeasures Electronics Intelligence Correlation Module Internet Control Message Protocol Integrated Communications Navigation IFF Avionics Integrated Communication Navigation and ID System (1) Intercom (2) Japanese radio mfr [ ~] (3) Integrated COMSEC Image Communication and Operations Node Internet Cache Protocol International Criminal Police Organization, see INTERPOL "I Seek You" (Internet message program) [~] International Committee of the Red Cross Incident Command System Independent Committee for the Supervision of Standards of Telephone Information Services (UK) interrupted continuous wave (1)Identification (2)Inside Diameter Integrated Air Defense System Integrated Data Analysis System for Spacecraft ID Data Combining Process (1)Intelligent Drive Electronics (small HD standard) (2)Integrated Developer Environment Integrated Defensive ECM

I-DGS IDLM IDM IDN IDPS IDSL IEC IED IED IEE IEE

Interim-Deploy able Ground Station and Mitigation Interference Detection, Locating, Improved Data Modem Internationali zed Domain Names Interim Digital Processing System ISDN Digital Subscriber Line International Electrotechnical Commission (1)Improvised Explosive Device (2)Imitative electronics deception (1)Institute of Electrical Engineers (US), merged with IRE (2)Institution of Electrical Engineers (UK)

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IEEE IETF IF IFE IFF IFF IFIM IFK IFL IFOR IFP IFPS IFR IFR IFRB IFRC IFSAR IGBT IGDL IGMP IGMP IGP IGRP IGY IHFR IHO IHS IHU IL ILC ILS IM IM IMA IMAP IMC IMD IMETS IMHO IMI IMINT IMIS IMM IMN IMO IMO IMS IMSA IMSP IMTS IN IN IN in INA

Institute of Electrical & Electronics Engineers Internet Engineering Task Force Intermediate Frequency (of a receiver) Inflight emergency (1)Identificat ion, Friend or Foe (2)Logic operation: "if and only if" International Flight Information Manual Incremental Frequency Keying International Frequency List, ITU doc on fiche or 2 CDs Implementation Force ("UN peacekeepers") Image Formation Processor Interactive Forecast Preparation System (1)Instrument Flight Rules (2)"I Follow Roads" International Frequency Registration Board Int'l Federation of Red Cross/Red Crescent Interferometri c Synthetic Aperture Radar Insulated Gate Bipolor Transistor Interoperable Ground Data Link Internet Group Management Protocol Internet Group Management Protocol Interior Gateway Protocols Interior Gateway Routing Protocol International Geophysical Year, big 50's research interval Improved high frequency radio International Hydrographic Organization Internal Hostile Structured threat Internal Hostile Unstructured threat Intermediate Language (Object-oriented computing) Integral Locomotive Computer (railroad) Instrument Landing System (1)Intermodula tion, causes spurious signals or distortion (2)Integrity Monitor (DGPS) Individual Mobilization Augmentee (FEMA) Internet Message Access Protocol Internet Mail Consortium Intermodulatio n Distortion Integrated Meteorological System In My Humble Opinion (Internet) CW prosign: interrogative; more often written "?" Imagery Intelligence Integrated Maintenance Information System Image Manifest Message Iraqi Media Network (1)Internation al Maritime Organization, part of UN (2)In My Opinion (Internet) Integrated Maritime Surveillance International Municipal Signal Association Internet Message Support Protocol Improved Mobile Telephone System (1)Intelligent Network (2)Indian Navy (3)Intelligence inch Iraqi News Agency

IND India (country code) indiv individual(s) INEFC Interagency National Emergency Fire Cache INFOSEC Information systems security ING International Notification Group(of IRAC) inHg inch of Mercury (air pressure) INMARSAT Intl. Maritime Satellite Org, a consortium, leases bandwidth on Marecs, Intelsat, Marisat for ship use. INMARSAT-A Inmarsat mobile voice/data terminal INMARSAT-B Improved version, replaced A INMARSAT-C Data-only INMARSAT terminal, also for SAFETYnet INMARSAT-E INMARSAT EPIRB INMARSAT-M INMARSAT terminal, voice only, not GMDSS-compliant INO Indian Ocean (MWARA) InP Indium Phosphide INS (1)Immigration & Naturalization Service (US, now part of ICE) INS (2)Inertial Navigation System INS (3)Indonesia (country code) INS (4)Internal Non-Hostile Structured threat INSCOM US Army Intelligence and Security Command INT (1)Interrogati ve (precedes a question) INT (2)International INT (3)Interrupted (transmission) INT (4)Interrupt (computer processing) intel Intelligence INTELCAST Intelligence Broadcast INTELNET Intelligence Network Internet Global interconnection of regional nets using TCP/IP InterNIC Internet Network Information Center INTERPOL International Criminal Police Organization Intl International, internal INU Internal Non-Hostile Unstructured threat IOC IOD IOM IONCAP IOR IOS IP IPA IPB IPCP IPF IPI IPIR IPIX IPL IPng IPS IPS IPSec IPSS IPT IPX IQ IQSY IR IR IRA IRAC IRBM IRC IRC

Index Of of Data co-operation Issue (DGPS) (a fax parameter) Installation, operation and maintenance IONospheric Communications Analysis and Prediction, original prediction algorithm, still used Indian Ocean Region Indian Ocean Station (NASA) Internet Protocol Intermediate power amplifier Intelligence Preparation of the Battlefield Internet Protocol Control Protocol Intelligence Processing Facility Intelligent Peripheral Interface Initial Photo Interpretation Report Interface Processor for Imagery Exchange Image Product Library IP next generation (1)Inches per second (2)Ionospheric Prediction Service (Australia, original name for space weather agcy) Internet Protocol Security International Packet SwitchStream, now GNS (UK) Integrated Program Team Internetwork Packet Exchange (Novell) In-phase/Quadr ature (analyzer plot) International Year of the Quiet Sun, 1960's research interval (1) Infrared (2) Instrument route (numbered military training route) International Reference Alphabet Interdepartmen t Radio Advisory Committee (part of US NTIA) Intermediate Range Ballistic Missile (1)Internation al Reply Coupon (2)Internet Relay Chat, world's primo time waster

IRC IRC IRC IRCA IRCCM IRCM IRE IRI IRINT IRIS IRL

(3)Internation Cross (4)Incremental al ly Red Related Carrier (CATV channel scheme) (5)Internation al Record Carrier International Radio Club of America Infrared Counter-Counterm easures Infrared Countermeasures Institute of Radio Engineers, now IEEE Ionospheric Research Instrument, transmitter part of HAARP Infrared intelligence Improved Radio Ionospheric Sounder Ireland (country code)

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IRN Iran (country code) IRQ (1)Interrupt request (computer hardware) IRQ (2)Iraq (country code) IRRM Image Recording Request Message IRRS Italian Radio Relay Service IRS (1)Information Receiving Station (SITOR) IRS (2)Internal Revenue Service (US) IRS (3)Infernal Revenue Service (U$) IRSS Infrared Surveillance System IRST Infrared Search and Track IS (1)Interval signal IS (2)Intermediat e Standard, formerly RS IS (3)Information System IS-136 ANSI-136 multiple access standard ISA (1)Industry Standard Architecture (PC-AT bus) ISA (2)In-Session Activation (telco) ISABPS Integrated Submarine Automated Broadcast Processor System ISAM Indexed Sequential Access Method ISARC Intelligence, Surveillance, and Reconnaissance Cell ISB (1)Independent Sideband ISB (2)Intermediat e Staging Base ISC Initial Scope Command (phase I) ISD Inverted Scanning Direction (radiofax) ISDL ISDN Digital Subscriber Line ISDN Integrated services & data network (telco) ISEC Information Systems Engineering Command ISF International Science Foundation ISI Inter-Symbol Interference ISM Industrial, Scientific, Medical (RF devices) ISMLS Interim Standard Microwave Landing System ISO (1)Internation al Organisation for Standardisation ISO (2)Internation al Organizations for Standardizatio n ISODE ISO Development Environment ISP Internet service provider ISR In-System Reprogrammable ISS (1)Information Sending Station (SITOR) ISS (2)Internation al Space Station ISSO (1)Information System Security Officer ISSO (2)Information Systems Security Organization (US) ISTR I Seem To Recall IT (1)Information Technology IT (2)Information Technology Directorate (FEMA) ITA International Telegraph Alphabet ITA1 International Telegraph Alphabet #1 (Old cablegrams, obsolete) ITA2 International Telegraph Alphabet #2 (Baudot double-shift) ITA3 International Telegraph Alphabet #3 (7-bit ARQ) ITA4 International Telegraph Alphabet #4 (FM VFT) ITER Improved Triple Ejector Rack ITFS Instructional Television Fixed Service ITO Installation transportation office ITS (1)Institute for Telecommunicatio n Sciences ITS (2)Intelligent Transportation Systems ITU International Telecommunicatio ns Union ITU-R M.493-6 - Protocol for maritime Digital Selective Calling ITU-R ITU Sector for Radiocommunicat ions, old CCIR ITU-T ITU-T ITU-TSS ITWS IUGG IUSS IUWDS IVAS IVCS IVTT IW IWS IWTS IXS j J/S J2 J2B J3E J4 JAA JAFO JAG JALBTCX JAN JANA JANET JAR JASORS JATACS JATCC

International Union Telecommunication Standardization Sector ITU Sector forTelecommunicatio Telecommunicati ns ons, old CCITT ITU Telecommunications Standards Section, old CCITT Integrated Terminal Weather System International Union of Geodesy and Geophysics Integrated Undersea Surveillance System International Ursigram and World Days Service Inward Voice Activated Services (telco) Integrated Voice Communication Systems Integrated VERDIN Transmit Terminal Information Warfare Information Warfare Squadron Integrated Terminal Weather System Information Exchange System Vector Jamming to signal ratio Intelligence directorate at a joint headquarters Single sideband, suppressed carrier tone teleprinting (emission) Single sideband, suppressed carrier AM radiotelephony (emission) Logistics directorate at a joint headquarters Joint Aviation Authorities (Europe) Just Another F[ine] Observer Judge Advocate General Joint Airborne Lidar Bathymetry Technical Center of Expertise Joint Army/Navy (spec) Jamahiriyah News Agency Joint Academic NETwork (UK) Joint Aviation Requirements (Europe) Joint Advanced Special Operations Radio System Joint Advanced Tactical Command and Control System Joint Air Traffic Control Center

JAWS Airport Wind System JAWSAT Juneau Joint Air Force-Weber State University Satellite JCS Joint Chiefs of Staff JCSE Joint Communications Support Element JDF Japanese Defense Force JDISS Joint Deployable Intelligence Support System JEDEC Joint Electronic Device Engineering Council Jeep Believed from "General Purpose" military vehicle, now a tradename JFC Joint force commander JFET Junction Field-Effect Transistor JIATF-E Joint Interagency Task Force, East (incorporates JTF-4) JIATF-S Joint Interagency Task Force, South (inc. JTF-6) JIATF-W Joint Interagency Task Force, West (inc. JTF-5) JIC Joint Information Center JINTACCS Joint Interoperability of Tactical Command and Control Systems JIT Just In Time (JAVA Compiler, proprietary to Sun) JITC Joint Interoperability Test Command (US) JIVE Jamming and Interception Vulnerability Estimator JJ (1)Joprep Jiffy (obsolete SAC weather report form) JJ (2)Transmissio n is in Japanese JJY Japanese standard frequency & time station [~] JMC (1)Joint movement center JMC (2)Jamaica (country code) JMPA Joint Military Postal Agency JMRO Joint medical regulating office JN Japanese Navy JOPES Joint Operations Planning and Execution System JOPREP Joint Operations Report JORN Jindalee Operational Radar Network (Australian OTH-B) JORN Jindalee OTH Radar Network JOSAC Joint Operational Support Airlift Center JOTS JOVIAL JP JP JP4 JPATS JPEG JPL JPNIC JRCC JRTC

Joint Targeting System Algebraic Language, once used by USAF Jules' Interoperability Own Version of the International (1)Joint publication (2)Jumper (connection) Jet Propulsion #4 (military jet fuel) Joint Primary Aircraft Training System Joint Photographic Experts Group (lossy compression for pictures) Jet Propulsion Laboratory, CA (NASA) Japanese Network Information Center Joint Rescue Coordination Center Joint Readiness Training Center (Ft. Polk, LA)

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JSC JSC JSF JSMSw JSORS JSTARS JTF JTF-4 JTF-5 JTF-6 JTFEX JTIDS JTRS JU JUH-MTF JWICS K Index K K k k/c K/cs KA9Q KAM KAWN KB kB kb/s KBD kBd Kbps KBS kc KCAS KCNA kcs KDU KGB KH kHz KIPM KISS km kMc knot KNRM KOR Kp kph KRE KSC KSCPAO ksh KSR kt

Johnson Space Center, TX Joint Spectrum Center Joint Strike Fighter Joint Spectrum Management Spectrum for Windows (software) Joint Advanced Special OPS Radio System Joint Surveillance Target Attack Radar System, aka "Joint STARS," E-8 surveillance aircraft Joint Task Force, usually US "War on Drugs" Caribbean drug interdiction unit, out of Key West, part of JIATF-E Pacific coast drug unit, part of JIATF-W South & Central America drug unit, part of JIATF-South Joint Task Force Exercise Joint Tactical Information Distribution System Joint Tactical Radio System JTIDS Unit (net member, like a "PU" in Link-11) Joint user handbook for message text format Joint Worldwide Intelligence Communications System Logarithmic, 3-hourly geomagnetic activity reading (1)1024 (decimal) of anything (loosely from hexadecimal) (2)CW prosign: "Go Ahead," technically an "Invitation To Transmit" A thousand of anything, in decimal (short for kilo) Kilocycles Kilocycles per second = kiloHertz Packet radio protocol, from callsign of its inventor [~] Kantronics All-Mode (packet/digital controller) Identifier attached to AWN weather products, as relayed by several HF stations Keyboard Kilobit, kilobaud kilobits per second Keyboard Kilobaud Kilobits per second Korea Broadcasting System Kilocycles per second, now kHertz Knots Calibrated Air Speed Korean Central News Agency Kilocycles per second, now kHertz Keypad-Display Unit Komitet Gossudarstwenn oy Besopasnostij (transliterated from Russian by Klingenfuss), old USSR comint, replaced by FAPSI Keyhole, optical recon satellite, KH-12 resembles Hubble KiloHertz Illuminati Primum Materium (Pirate) Keep it simple, stupid (packet radio mode/engineerin g golden rule) kilometer kilo-Megacycle , now GigaHertz Nautical mile/hour [~] Koninklijke Nederlandse Redding Maatschappij (Dutch SAR org.) (South) Korea (country code) Planetary K index kilometer per hour (North) Korea (country code) Kennedy Space Center, Cape Canaveral, FL Kennedy Space Center Public Affairs Office (NASA) Korn shell (Unix) Keyboard Send-Receive knot (nautical mile per hour)

KT knots KTS knots Ku-band 12-18 GHz microwave band kV Kilovolt KVA KiloVolt-Amp(s ); can <> kW in highly reactive circuit kW Kilowatt L Inductance (in Henrys) L left (with reference to runway designation) L2TP Layer 2 Tunneling Protocol LA Low altitude Ladar Laser Radar LAHSO Landing And Hold Short Operations LAN Local Area Network LANL Los Alamos (NM) National Laboratory LANTAREA USCG Atlantic Area LANTIRN Low Altitude Navigation and Targeting Infra Red for Night LAO Laos (country code) LAPD (1)Link Access Procedure D-Channel LAPD (2)Los Angeles Police Department LAPM Link access protocol for modems LASER Light Amplification by Stimulated Emission of Radiation LAST last observation before a break in coverage at a manual station LAU Launcher Adapter Unit LBA Logical Block Addressing (Disk access) LBAR Limited area BARotropic (NCEP weather model) LBN Lebanon (country code) LBR Liberia (country code) LBY Lybia (country code) LC Limited Coastal (service) LCA St. Lucia (country code) LCAC Landing Craft, Air-Cushioned (large hovercraft) LCC Launch LCD Liquid Control Crystal Center Display LCMP Atlantic Composite Broadcast LCP Link Control Protocol (PPP) LCS Limited Coastal Station LCU Landing Craft, Utility (US Army) LDAP Lightweight Directory Access Protocol LDF Lightweight digital facsimile LDOC Long Distance Operational Control (civil aviation) LDP Landing Decision Point LDR (1)Low Data Rate LDR (2)Loader LDTWA Long Dual Trailing Wire Antenna (TACAMO) LEARN Law Enforcement Amateur Radio Network LEASAT Leased Satellite (US military comm) LED Light Emitting Diode LEO Low Earth Orbit ("Little LEO" = a data satellite) LES Land Earth Station LF (1)Low Frequency (30-300 kHz) LF (2)Linefeed LFO Low frequency oscillator LG Logistics Group LGTR Laser Guided Training Round LHCP Left-hand circular polarization LIAR Liar Imitates Apply Recursively (recursive) Lidar Light Detection & Ranging (light "radar") LIE Liechtenstein (country code) LIM (1)Lotus/Intel /Microsoft, original spec for PC extended memory LIM (2)Line interface module LINCOMPREX Link Compression and Expansion, an ACSB system Linux "Linus' Unix," open source shareware version of Unix LIRL LL LLC LLC LLCC LLNL LLP LLWAS LMAO LMCC LNB

Low Intensity Runway Landline, "Lima Lima" Lights (1)Logical Link Control (2)Limited Liability Corporation (US) Low Level Cloud Center (wx obs) Lawrence Livermore National Laboratory Limited Liability Partnership (US) Low Level Wind Shear Alert System Laughing My A-- Off (Internet) Land Mobile Communications Council Low Noise amplifier/Block downconverter

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LNBF ln LNP LO LOC LOC log LOGCAP LOGPAC LOI LOJACK LOL LORAC LORAN LORAN-A LORAN-C LORAN-D LOS LOS LOTS LOWFER LP LP LP LP LPB LPD LPDA LPDU LPFM LPI LPM LPR LPRS LPT LPTV LPVA LQA LR LRA LRC LRC LRCOC LS LSASS LSB LSB LSB LSDIS LSE LSI LSI LST LST LSV

Low Noise amplifier/Block downconverter Feedhorn Natural logarithm Local Number Portability (cell phones) Local oscillator (of a receiver) (1)lines of communication (2)location Common logarithm Logistics Civil Augmentation Program Logistics package Low Opportunity of Intercept Vehicle locator beacon activated & DF'd by police Laughing Out Loud (internet) Long Range Accuracy (NASA booster recovery) Long Range Navigation Discontinued 160m Loran system 100 kHz Loran system Military Loran system (1)Loss Of Signal (2)Line of sight logistics-over-the-shore Low-Frequency Experimental Radio (~164-190 kHz) (1)Long Playing (old records) (2)Low pass (filter circuit) (3)Linking Protection (US mil ALE security) (4)Log Periodic (antenna) Logistics preparation of the battlefield Line Printer Daemon Log Periodic Dipole Array HDFL: Link Protocol Data Unit Low-Power FM (broadcasting) Low Probability of Intercept Lines per minute Line Printer Low-Power Radio Service (FCC) Logistics preparation of the theater Low-Power TV (broadcasting) Log Periodic V Array Link Quality Analysis (databursts heard from ALE radios) Last Received (message) Landing Rights Airport (1)Longitudina l Redundancy Check (computing) (2)Logistics and Readiness Center Long Range Company Operational Control Last Sent (message) Local Security Authority Subsystem Service (Windoze) (1)Lower Sideband (2)Linux Standard Block (3)Least Significant Bit/Byte Light and Special Division Interim Sensor (US Army) Logistics support element (1)Large scale integration (of chips) (2)Locomotive System Integration (1)Landing ship, tank (2)Local Standard Time Logistic Support Vessel (US Army)

LTG LTR LTRS LUF LUT LUU LWR LZW M M M M m M/S M/S m/s M/V m/v M1FC mA MAC MAC Mac MACOM MacTCP MAFFS MAFOR MAGIS mAh MAIT MAN

lightning Letter(s) Letters case (Baudot lower case) Lowest Usable Frequency (varies with path) Local User Terminal Parachute Flare lower Lempel-Ziv-Wel ch, lossless compression algorithm for data (1)Mega, meg, a million of anything, or 1,048,576 bytes (hex) (2)minus, less than (3)Below zero C (4)Statute Mile Meter (39.37 inches) (1)Motor Ship (also MS, M.S.) (2)Mile per second Meter per second Motor Vessel (also m/v) Motor Vessel (also MV) Model 1 Full Capacity (Air traffic control) milliamperes (1)Military Airlift Command, now AMC (2)Medium Access Control (computer networks) Macintosh (computer) Major command TCP/IP package for Macintosh Modular Airborne Fire Fighting System (tank for C-130) Maritime weather forecast Marine Air-Ground Intelligence System miliamp-hour(s) Major Accident Investigation Team (CHP) Metropolitan Area Network, halfway between a LAN and a WAN

MANPAD MAP MAPI MAPS MARAD MARC MARCEMP MARO MARS MARS MARSA MARSEC MASER MASH MASM MATIC MATS MAU MAVICA MAYDAY MB mb MBCS MBCS MBDL MBKS MBO MBONE Mbps MBR MCA

Man-Portable Defense Maghreb Arabe Air Presse Mail/Messaging Applications Programming Interface Mail Abuse Prevention System (Internet) MARitime ADministration [~] MAchine Readable Catalog Manual Relay Center Modernization Program (USN) Maritime Air Radio Organization (1)Military Affiliate Radio System (US) (2)Maritime (mobile) Access & Retrieval System (ITU ship lookup) Military Assumes Responsibility for Separation of Aircraft Marianas Sector (US Coast Guard) [~] Microwave Amplification by Stimulated Emission of Radiation mobile army surgical hospital, may be obsolete Macro-Assemble r (computer code) Mobility Assessment Test and Integration Center Military Air Transportation Service, became MAC, now AMC Media Attachment Unit, a network transceiver Magnetic Video Camera Prosign: Distress traffic follows; repeated 3 times [~] Megabyte millibar (1)Multi Byte Character Set (Unicode) (2)Magnetic Bridge Current Sensor Missile Battery Data Link Multi-Button Key Set (telco) Mailbox Multicast Backbone Megabytes per second Master Boot Record ("boot sector") Movement control agency

MCC MCC MCFB MCM MCP MCP MCP MCS MCS/P MCVFT MDR

Master Control Center Movement control center Multi-Channel Fleet Broadcast Mine Countermeasures (1)Mobile communications package (2)Multimode Communications Processor (packet) (3)Male chauvinist pig Mission Communications System Maneuver Control System/Phoenix (US Army) Multichannel Voice Frequency Telegraph (multiplex RTTY) Medium Data Rate

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MDS Multipoint Distribution Service MDT (1)Mobile Data Terminal (usually police) MDT (2)Mountain Daylight Time, US zone includes Rockies med medical MEDAFS Mine Warfare Environmental Data Analysis and Fusion System MEDCOM Medical command MEDFER Medium-frequen cy Experimental Radio (low power ~510-1710 kHz) MEDICAL Voice prosign attached to c/s of vessel with emergency medical supplies or patients, pronounced MAY-DEE-CAL MEDICO Emergency Medical Communications MEDLOG Medical logistics MEL Maximum Elevation (of a spacecraft) MEMA Massachusetts Emergency Management Agency MEOW (1)Maximum Envelope of Water MEOW (2)Maximum Envelope of Winds MER-# Mars Exploration Rover # (NASA) MERCAST MERchant ship broadCAST MEROD Message Entry and Read Out Device (Thales-Racal, see RAC-ARQ) MERS Mobile Emergency Response Support (FEMA) Messenger Mercury Surface, Space Environment, Geochemistry and Ranging Met Office Weather office at a base MET Meterological METAR Meteorological observation code for routine aviation METAREA Meteorological Area, same as a NAVAREA (see WMO) METARS Plural of METAR Meteo Meteorological METOC Meteorological and Oceanographic Centre (Halifax, NS) Metro Meteorological office METSAT Meterological Satellite MF (1)Medium Frequency (300-3000 kHz) MF (2)Multifrequency mf Microfarad MFA Ministry of Foreign Affairs MFD Modulated Fractional Division MFM Modified Frequency Modulation (Miller Coding) MFSK Multiple Frequency Shift Keying mgt management mH Millihenry MHD Magnetohydrody namics; behavior of plasmas in magnetic fields, such as the ionosphere and sunspots MHE materials-hand ling equipment MHFCS Australian Modernised HF Communication System MHS Message Handling System MHz MegaHertz MI (1)Military intelligence MI (2)shallow mi mile (1.6 km) MI5 Directorate of Military Intelligence, group 5 (UK domestic) MI6 Directorate of Military Intelligence, group 6 (UK foreign, aka SIS) MIB Management Information Base MICR Magnetic Ink Character Recognition (as used by banks) MICS Medical Implant Communications Service MID (1)Middle East (MWARA) MID (2)Maritime Identification Digits, country code prepended to MMSI MIDI Music Industry Digital Interface MIDS Multifunctiona l Information Distribution System MIFG Shallow Fog MIJI Meaconing, Intrusion, Jamming & Interference ("Jammer writeup") Mil (1) Military Mil (2) Milliampere MIL-188-110A NATO standard for single-tone modems MIL-188-141A NATO standard for ALE controllers MIME Multipurpose Internet Mail Extensions, allows attachment of binaries to ASCII text letters MIMS Medical Information Management System min Minute MINIMUF Miniature Maximum Usable Frequency calculator, classic BASIC MUF prediction algorithm MINREX Ministerio de las Relaciones Exteriores (Cuban news agency) MIR Not an acronym; transliteratio n of Russian for "Peace" MIREX Mir Experiment, amateur robot packet station on Mir MIRL Medium Intensity Runway Lights MIS Management Information Systems MISDN Mobile ISDN MISR Multi-angle Imaging SpectroRadiomete r (Terra satellite) MIT Massachussetts Institute of Technology M-JPEG JPEG used for moving pictures (cf JPEG, MPEG) mkr Marker ML Machine language, how computers store instructions MLB (1)Motor Lifeboat MLB (2)Magnetic Longwire Balun MLM Marine Location Marker MLS Microwave Landing System MLSE Maximum Likelihood Sequence Estimator MLSO Mauna Loa Solar Observatory MLT Magnetic Local Time MM Maritime mobile mm Millimeter MMC (1)materiel management center MMC (2)Microsoft Management Console mmf MMS MMSI MMX MNCS MNP MOA MOAB Mob MOC MOC MOC MOCA MoD MOD Mod Mode A Mode B Modem MODIS MODU MOI MOOTW MOP MOP MOPP MOS MOS MOSAIC MOSFET MOSS

micro-microfar ad, changed to picofarad Maritime Mobile Service Maritime Mobile Service Identity (code for DSC) Multimedia extensions (microprocessor architecture) Master Net Control Station Modem Network Protocol Military Operation Area Massive Ordnance, Air Blast Mobile (1)Mission Operation Center (2)Ministry Of Commerce (Canada) MERS Operations Center (FEMA nested acronym) Minimum Obstruction Clearance Altitude Ministry of Defence (UK) Mobile Offshore Drilling Modification (to radio) SITOR-A (ARQ) SITOR-B (FEC) Modulator/Demodulator Moderate Resolution Imaging Spectroradiomete r (Terra satellite) Mobile Offshore Drilling Update Ministry Of Information Military operations other than war (1)Measure Of Performance (2)Ministry Of Petroleum mission-orient ed protection posture (0-4, 4 being full suit) (1)Metallic Oxide Silicon (2)Mitoudt Sound, shooting film with a silent camera Multifunctiona l On-the-move Secure Adaptive Integrated Communications MOS Field Effect Transistor MIME Object Security Services

MOTD MOTIS MOV MOX MOZ MOZ MP MP MP MP MP2

Message The Day Text Interchange Service, ISO version of MHS Message Of Orientated moved/moving/movement Manually Operated Switching (1)Mozambique (country code) (2)Mozilla (computer browser) (1)Military Police (US) (2)Member of Parliament (UK) (3)Multiproces sor (computer h/w) Magnetopause MPEG-1 Level 2, replaced by MP4

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MP3 MP4 MPDU MPEG MPG MPG mph MPSA MPSAP MPX MR MRB MRC MRC MRCC MRE MRF MRO MRS MRSC MRS MPA MRT MRT MRU MS ms mS MS MS MS-188 MSB MSB MSC MSE MSE MSF MSF MSFC msg MSI MSI MSIS MSK MSR MSR MSS MST MST MT MT MT MTA MTA MTADS MTBF

MPEG-1 Level 3, CD-quality compression scheme MPEG-1 Level 4, audio/video compressor HFDL: Media access Protocol Data Unit Motion Picture Expert Group, lossy compression for video (1)File extension: MPEG video (2)Miles Per Gallon mile per hour Military Postal Service Agency Mobile Public Safery Answering Point Multiplex Magnetoresistive Marine Radio Beacon (1)Mobile Radio Communications (2)Morocco (country code) Maritime Rescue Coordination Center Meal, Ready-to-Eat Medium Range Forecast (NCEP) medical regulating office Mountain Radio Service Maritime Rescue Sub-Center Medium Range Surveillance Maritime Patrol Aircraft (1)Mountain Rescue Team (2)Mauretania Most Recently Used Master Station millisecond millisiemen (1)Motor Ship (2)Meteor Scatter MIL-STD-188, Military telecom standards (1)Most Significant Bit/Byte (2)Main Support Battalion Military Seaflift Command (US) (1)Mobile Subscriber Equipment (2)Mean Square Error (1)English standard frequency & time station (2)Medicins Sans Frontiers (Doctors Without Borders) NASA Marshall Space Flight Center Message (1)Maritime Safety Information (2)Marine Safety Information Mass Spectrometer Incoherent Scatter (research) Minimum Shift Keying (1)main supply route (2)Mobile Sea Range Mobile Satellite Service (1)Mountain (US) Standard Time, zone includes Rockies (2)Maintenance support team (1)Monitoring Times (**the bible**) (2)mountain(s) (3)Mitigation Directorate (FEMA) (1)Message Transfer Agent (2)Metropolita n Transit Authority Multi-sensor Towed Array Detection System Mean Time Before Failure

MTF MTI MTMC mtr MTTR MTU MUF MULTICS Mung Mung MURS MUX mV MV MVS MW MW mW MWARA MWP MWR MX mx MYA MYM MYP N N N/A N0N NA

medical treatment facility Moving Target Indicator Military Traffic Management Command Meter, either distance unit or measuring device Mean Time To Repair Maximum Transmit Unit (TCP/IP packet length) Maximum Usable Frequency (varies with path) Multiplexed Information and Computing Service; Unix precursor (1) Verb: to Mash Until No Good (2) Verb: to Mung Until No Good (recursive acronym) Multi-Use Radio Service Multiplex, multiplexer Millivolt Motor Vessel Multiple Virtual Storage (large IBM computers) (1)Medium Wave (typically 530-1710 kHz) (2)MegaWatt MilliWatt Major World Air Route Area Meteorologist Weather Processor Morale, welfare, and recreation Mail Exchange Record Music Myanmar (Burma;country code) My Mailbox (packet) Personal Mailbox (packet) No Change north not applicable Unmodulated, steady carrier, old "A0" (1)North America

NA NA NAAS NAB NAB NABA NABER NACES NAD 83 NADC NADEP NADGE NAEC NAF NAFB NAK NALF NALO NAM NANP NAOC NARTE NARTEL NAS NAS NAS NASA NASA NASTD NAT NAT

(2)Not applicable, N/A Not authorized Naval Auxiliary Air Station (1)National Assn of Broadcasters (2)Naval Amphibious Base, USN, Coronado, CA (SEALs train there) North American Broadcasters Assn. National Association of Business/Emerge ncy Radio Naval Aircrew Common Escape System North American Datum of 1983 Naval Air Development Center Naval Air Depot NATO Air Defence Ground Environment Naval Air Engineering Center Naval Air Facility (US) National Assn of Farm Broadcasters Negative Acknowledgment (error in received data, ASCII 21d) Naval Auxiliary Landing Field Naval Air Logistics Office Number Assignment Module (Cellular) North American Numbering Plan (telco) National Airborne Operations Center, aka Nightwatch, old NEACP Natl Assn of Radio & Telecommunicati ons Engineers North Atlantic Radiotelephone (1)Naval Air Station (2)National Academy of Sciences (US) (3)National Airspace System (1)National Aeronautics and Space Administration (2)National Acronym Slinging Agency National Association of State Telecommunication s Directors (1)North Atlantic (MWARA) (2)Network Address Translation

NATC Naval Test Center NATO North Air Atlantic Treaty Organization NATOPS Naval Air Training and Operating Procedures Standardization NAV Navigation NAV/COMM Airplane Navigation/Commu nication radio NAVAID Navigational aid NAVAIR Naval Air Systems Command NAVAREA Navigational Area (IMO/IHO) NAVCEN USCG Navigation Center, VA NAVCOMMAREA Naval Communication Area NAVCOMPARS Naval Communications Processing and Routing System

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NAVCOMMSTA Naval Communications Station NAVCOMTELCOM Naval Computer and Telecommunicat ions Command NAVMARCORMARS Navy/Marine Corps Military Affiliate Radio Service (US) NAVMTO Navy Material Transportation Office NAVRADTRANSFAC Navy Radio Transmitter Facility NAVSAT NAVigation SATellite NAVTEX Navigational Telex, Navigational Text (518 kHz SITOR-B) NAWAS National Warning System NAWC Naval Air Warfare Center NAWCAD Naval Air Warfare Center Aircraft Division NAWC-WPN Naval Air Warfare Center NAWS (1)Naval Air Weapons Station NAWS (2)Old group call: Notice to Allied Warships NB (1)Narrowband NB (2)Noise blanker NBC (1)Nuclear, Biological, Chemical (warfare) NBC (2)National Broadcasting Company NBDP Narrowband direct printing (RTTY) NBDPT Narrowband direct printing telegraphy NBF NetBIOS Frames NBFM Narrowband frequency modulation NBR Narrowband Receiver NBS National Bureau of Standards, now NIST NBSV Narrowband Secure Voice NBSVS Narrowband Secure Voice System NC (1)No Connection NC (2)Normally Closed NC3A NATO Consultation, Command and Control Agency (Nested acronym!) NCA (1)North Central Asia (MWARA) NCA (2)National Command Authorities, US nuclear "button" NCAR National Center for Atmospheric Research, CO NCC National Coordinating Center for Telecommunicatio ns (US NCS) NCCOSC Naval Command, Control and Ocean Surveillance Center NCCS Navy Command and Control System NCDC National Climatic Data Center NCEM National Coordinating Council for Emergency Management, now IAEM NCEP National Center for Environmental Prediction NCFSK Non-Coherent Frequency Shift Keying NCG Nicaragua (country code) NCIC National Crime Information Center, US database of police records NCIS Naval Criminal Investigative Service NCO Non-Commission ed Officer NCPi Netware Core Protocol NCR (1)National Capital Region (US) NCR (2)National Cash Register NCS (1)National Communications System, US government NCS (2)Net Control Station NCS (3)Naval Communications Station NCS (4)Network Coordinating Station NCSA National Centre for Supercomputing Applications, developed Mosaic web browser, which became Netscape (Mozilla) NCTAMS Naval Computer and Telecommunicat ions Area Master Station NCTS Naval Computer and Telecommunicat ions System NCTSI Navy Center for Tactical Systems Interoperability (US) NCWF National Convective Weather Forecast ND Nondirectional NDB Nondirectional beacon NDIS Network Driver Interface Specification NDMS National Disaster Medical System NDRS National Distress and Response System NDRSMP National Distress and Response System Modernization Project NDS NUDET Detection System, see NUDET NE Northeast NEACP National Emergency Airborne Command Post, "kneecap," now NAOC NECC National Emergency Coordination Center (FEMA) NECN National Emergency Coordination Network NERC North American Electric Reliability Council (bulk power delivery) NERK Old CW group call, obsolete NESDIS National Environmental Satellite, Data and Information Service NESP Navy EHF Satellite Program NEST Nuclear Emergency Search Team ("Flynest") NET/ROM Network packet radio protocol NetBEUI NetBIOS Extended User Interface NetBIOS Network Basic Input/Output System NEXRAD Next generation of (weather) Radar NFCB National Federation of Community Broadcasters (US) NFCC National Frequency Coordinators' Council NFO Naval Flight Officer (same as RIO) NFR Navy Fleet Relay (USN secure satcom) NFS Network File System NFWS Navy Fighter Weapons School NGA National Geospatial-Intel ligence Agency (ex-NIMA) NGLT Next Generation Launch Technology NGO (1)Nongovernme ntal organization NGO (2)Near-Geosyn chronous Orbit NGO (3)Naval Gunnery Officer NHC National Hurricane Center, i.e. TPC NHK Nihon Hoso Kyokai , Japanese public broadcast co. NIC (1)Network Interface Card NIC (2)Network Information Center NiCad Nickel Cadmium (battery) NiCd Nickel Cadmium (battery) NICP National inventory control point NIEX No-Notice Interoperabilit y Exercise (NATO) NIFC National Interagency Fire Center (US forest fire resources) NIFTP Network Independent File Transfer Protocol NIL CW prosign: "No traffic" or "I copy nothing" NIMA National Imagery and Mapping Agency (now NGA) NIMBY Not In My Back Yard (place people want radio towers) NiMH Nickel-metal hydride (battery) NiMh Nickel-Metal-H ydride (battery) NIMS Naval Ionospheric Measuring System (UK) Niner Number nine, to distinguish from five [~] NIPRNET Non-Classified Internet Protocol Router Network (military's own Internet, with SIPRNET) NIS Network Information System N-ISDN Narrow Band-Integrated Services Digital Network N-ISDN Narrowband ISDN NISO National Information Standards Organisation (US) NISP Networked Information Services Project (UK) NISS National Information on Software and Services (UK) NIST National Institute of Standards & Technology (old NBS) NLM Netware Loadable Module (extension of Novell Netware) NLSP Netware Link Services Protocol Nm (1)Nautical Mile(s) Nm (2)Nanometer NM Nautical Mile(s) nm Nautical Mile(s); about 1.24 statute miles(1.85 km) NMA US Coast Guard COMMSTA, Miami, now controlled from CAMSLANT NMC NMC NMC NMEA NMF NMG NMN NMO NNCC NNE nnnn

(1)National Meteorological Center Pt Reyes, CA (2)Call of US Coast Guard CAMSPAC (3)Naval Missile Center National Marine Electronics Assn US Coast Guard COMMSTA, Boston, will be ctld from CAMSLANT US Coast Guard COMMSTA, New Orleans, remote from CAMSLANT US Coast Guard CAMSLANT Chesapeake, VA US Coast Guard COMMSTA, Honolulu National Network Control Center (FAA) North-northeast RTTY/Telex ending characters

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NNR NNTP NNW NO NOAA NOC NOC NOE NOGAPS NOI NOIWON NOJ NOMTS NORAD NORAPS NORDO NORDO NORLANT norm NOS NOS NOS NOS NOSC NOSIG NOSPECI NOTAM NP NPA NPN NPR NPRM NPS NPSC NPSTC NRaD NRAO NRC NRC NREN NRI NRK NRL NRN NRO NRS NRT NRV NRWATS NRZ NRZL NRZM NRZS NS NS/EP NSA NSA NSA NSAP NSAWC NSAWC NSE NSF NSFNET NSK NSS NSTAC NSU nT NT NTA NTA NTC NTCC NTCN NTIA NTM NTMS NTN NTS NTS NTSC NTSC NTT NUC NUCINT

National Nature Reserve Network News Transfer Protocol (USENET) North-northwest Normally Open National Oceanic & Atmospheric Administration (1)Network Operation Center (2)Non-Officia l Cover (now "OGA") Nap-Of-the-Ear th (low altitude attack) Navy Operational Global Atmospherics Prediction System Notice Of Inquiry (FCC rulemaking) National Operations Intelligence Watch Officers Net US Coast Guard COMMSTA, Kodiak Naval Ordnance Missile Test Center North American Aerospace Defense Command Navy Operational Regional Atmospherics Prediction System (1)No Radio (2)Aircraft has no radio (uses visual signals to tower) North Atlantic normal (1)Amateur version of TCP/IP (Internet protocols) (2)National Ocean Service (3)Network Operating System (4)New, Old-Stock (wine or vacuum tubes) Naval Ocean Systems Center, San Diego, CA, now NCCOSC No Significent Weather no SPECI reports are taken at the station Notice to Airmen North Pacific (MWARA) Notice of Proposed Amendment Negative/Posit ive/Negative; transistor type National Public Radio (US) Notice of Proposed Rule Making (FCC) National Park Service (US) National Process Serving Center (FEMA) National Public Safety Telecommunicatio ns Council Naval Research and Development (US) National Radio Astronomy Observatory (1)National Radio Club (2)Nuclear Regulatory Commission (US) National Research and Education Network, faster Internet successor for research sites Net radio interface Norsk Rikskringkasting (Denmark broadcast co.) Naval Research Laboratory (US) National Radio News (Australia) National Reconnaissance Office (operates US spy satellites) Nordic Radio Society Navigation Response Team US Coast Guard COMMSTA, Guam, controlled from CAMSPAC Naval Rotary Wing Aircraft Test Squadron Nonreturn to Zero Return To Zero Level Nonreturn To Zero Mark Nonreturn To Zero Space Node switch National Security/ Emergency Preparedness (1)National Security Agency (US intercept and crypto) (2)No Such Agency (NSA used to "not exist") (3)Never Say Anything (NSA secrecy policy) Network Service Address Point Naval Strike and Air Weapons Center (replaces "Top Gun") Navy Strike Aircraft Weapons Center National Support Element National Science Foundation (US) National Science Foundation Network, old Internet backbone Narrowband shift keying Navigation Safety System National Security Telecommunicati ons Advisory Committee (US) Network Server Unit Nanotesla (unit of magnetic flux=1nWeber/m) Not Tested (1)National Telecommunicatio ns Alliance (NCS) (2)National telecom administration (ITU member bodies) National Teleregistration Center (FEMA) Naval TeleCommunicatio ns Center National Telecommunicatio n Coordination Network National Telecommunicatio ns and Information Administration Notice to Mariners National Telecommunicatio ns Management Structure (national emergency plan) NATO Track Number (1)National Traffic System, amateur message network (2)Naval Telecommunicatio ns System (1)National Television Standards Committee (US TV standard) (2)Never The Same Color (result of using above) Nippon Telegraph and Telephone (Japanese "FCC") Nuclear Nuclear Intelligence

NUCO Numerical Code (US Navy) NUDET Nuclear detonation NUKO Old group call: To All Ships Receiving MERCAST NUL Nothing (ASCII 0000) NVG Night-Vision Goggles NVIC Navigation & Vessel Inspection Circular NVIS Near Vertical Incidence Skywave NVOAD National Voluntary Organizations Active in Disaster NVRAM Nonvolatile Random Access Memory NW (1)CW brevity code: "Now," or "New" NW (2)Northwest NWC Naval Weapons Center NWCG National Wildfire Coordination Group NWEF Naval Weapons Evaluation Facility NWR NOAA Weather Radio NWS (1)National Weather Service (US) NWS (2)Naval Weapons Station NWSFO National Weather Service Forecsting Office NWSOP National Winter Storm Operation Plan nx News NYSEMO New York State Emergency Management Office O&O Owned & Operated (by broadcast network) o/l Online O/R Address Originator/Rec ipient Address O/R On request O/S Out of service OARNET Ohio Academic Resources Network OASD/C3I Office of the Assistant Secretary of Defense for command, control, communications and intelligence OASIS Operational and Supportability Implementation System (FAA) OBC On-board computer OBS Ship weather report in standard form OCA OCC OCD OCD OCNL OCONUS OCOT OCR OCR OCS OD

Oceanic Control Area Operations Control Center (Centre) (1)Office of Civilian Defense, obsolete (2)Operations Control Division occasional Outside Continental United States Office of the Chief of Transportation (US Army) (1)Optical Character Recognition (2)Optically Coupled Regenerative Office of Coast Survey (1)Officer of the Day

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OD OD ODBC ODMA ODMP OE OEI OEM OFCM OFDM OFP OG OGA OHD OIC OIS OLAC OLAP OLF OLTP OLX OM OMEGA OMF OMS OO OOB OOB OOC OOK OOOI OOP OOW OP op OPAL OPBAT OPC OPC OPCEN OPCODE OPCON OPF OPLAN OPORD OPSEC OQPSK OR ORACLE ORBS ORF ORFM org OS OS OS OS/2 OS/2 OSC OSC OSC OSCAR OSCE OSCR OSEI OSI OSIR OSIRM OSPF OSS OSTP OSWER OTAN OTAR OTASP OTCIXS OTHB OTHR OUI Out OVC Over OVR OWF OWI P

(2)Overdose (3)Outside Diameter Open DataBase Connectivity (Microsoft) Orthogonal Domain Multiple Access Orbiter Maintenance Down Period (NASA) Operating Expense One Engine Inoperative Original Equipment Manufacturer Office of the Federal Coordinator for Meteorology Orthogonal Frequency Division Multiplex Operational Flight Program Operations Group Other Governmental Agencies (formerly "NOC") overhead Officer In Charge Organization for Internet Security Open Language Archives Community On-Line Analytical Processing Outlying Landing Field (US Navy) On-Line Transaction Processing (IBM) OLE Custom Control (MS made it up... i didn't) Male voice ("Old Man") Optimized Method for Estimated Guidance Accuracy (VLF Navigation) (Weather) Observation Markup Format ("ohms") Orbital Maneuvering System (NASA) Official Observer (Amateur) (1)Out of band (2)Out Of Bounds (classic Internet hack) Official Observer Coordinator (Amateur) On-off keying Out, Off, On, In (ACARS time reporting) Object-Oriente d Programming Operations Other than War Observation Post Operation Orbiting Picosat Automatic Launcher Operations, Bahamas and Turks (see JTF) (1)Ocean Prediction Center, Camp Springs, MD (2)Operations Center Operations Center Operations code Operational control Orbiter Processing Facility (NASA) Operations plan Operation order Operation Security Offset Quadrature Phase Shift Keying Offroute (unscheduled flights, usually military) Oak Ridge Automated Computer and Logical Engine Open Relay Behaviour-modific ation System (anti-email-spam) Oesterreichisc her Rundfunk (Austrian broadcasting co.) Office of Radio Frequency Management organization (Internet) (1)Operating system (code that runs a computer) (2)Operations Support Operations Specialist (combines older USCG RD and TC) Operating System 2, proprietary IBM op-system for PS/2 Operating System II (IBM) (1)Operations Systems Center, USCG, VA (2)On-Scene Coordinator (3)Oscillator [~] Orbiting Satellite Carrying Amateur Radio Organization for Security and Cooperation in Europe Ocean Surface Current Radar Operational Significant Event Imagery (NOAA) Open Systems Interconnection (coincidentally , OSI is by ISO) ISO's famous 7-layer "OSI Reference Model" for packet ISO's famous 7-layer "OSI Reference Model" for packet Open Shortest Path First Office of Special Services, WWII Office of Science and Technology Policy (US Government) Office of Solid Waste and Emergency Response NATO in French Over-The-Air Rekeying (crypto) Over-the-Air Service Provisioning (telco) Officer in Tactical Command Information Exchange System Over The Horizon Backscatter radar Over the horizon radar Organizational ly Unique Identifier Voice prosign: Contact completed, going back to listening overcast Voice prosign: Transmission completed, go ahead Overcast Optimum Working Frequency, realtime version of FOT Office of War Information, WW II greater than

P Plus P Power (in watts) P/N Part number p/p (1)phone patch p/p (2)point-to-point p/p (3)peak-to-peak PA (1)Power amplifier PA (2)Public address system PA (3)Passenger agent PA (4)Privacy Act PA (5)Proceed Authority PAC (1)Pacific PAC (2)Personnel and Administration Center PAC (3)Political Action Committee PAC-3 Patriot Advance Capability 3 PACAF Pacific Air Force (US) PACAREA Pacific Area (USCG) PACSAT Packet radio satellite PACTOR Packet teleprinting over radio (modes 1 and 2) PAD Packet assembler/disas sembler PADAN PAcket Digital Amateur Network PADIL PATRIOT Digital Information Link (US missile batteries) PAL Plus 16:9 PAL PAL (1)Phase Alternate Line (W. Europe TV standard) PAL (2)Positive Arm Latches PAM (1)Phase-Ampli tude Modulation, modems PAM (2)Pulse Amplitude Modulation PAM (3)Pluggable Authentication Modules (Linux) PAN Prosign: priority safety traffic follows (also "PAN PAN") [~] PANA Pan-African News Agency PanAmSat Pan American Satellite Co., operates 17 COMSATs PAO Public affairs officer PAP (1)Polska Agencja Prasowa PAP (2)Password Authentication Protocol, computer networks PAPI Precision Approach Path Indicator PAR Precision Radar Approach, new name for GCA PARC Palo Alto Research Center (Xerox, obsolete) PASR personnel accounting and strength reporting PATRECONFOR Patrol and Reconnaissance Force (US Navy) PATWAS Pilot Automated Telephone Weather Answering Service PAVE PAWS Phased array SLBM warning system, 4 US Coastal sites PAVE Precision Acquisition Vehicle Entry

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PAWS (1)Phased Array Warning System, e.g., PAVE PAWS PAWS (2)Programmabl e Analyst Work Station PAWSS Ports and Waterways Safety System PAX (1)Passengers PAX (2)~"Peace" in Latin ("Pax Americana") PBBS Packet Bulletin Board System PBS Public Broadcasting System PBT Portable Breathalyzer Test (police drunk testing) PBX Private Branch Exchange (telco) PC (1)Personal Computer PC (2)Printed Circuit PCI Peripheral Component Interconnect (Intel) PCM Pulse code modulation PCMCIA Personal Computer Memory Card International Association PCN Personal Communication Network PCS (1)Personal Communication Service (mobile phone) PCS (2)Performance Control System PCS (3)Prelaunch Compatibility Station (GPS) PCS (4)Personal Communications System PDA Personal Digital Assistant (palmtop computer) PDC Personal Digital Cellular PDF Portable Document Format (Adobe) PDM Pulse Duration Modulation PDP Programmed Data Processor (DEC, 1960 on, classic machines) PDS Particularly Dangerous Situation (NOAA/NWS) PDT Pacific Daylight Time, US PDU Protocol Data Unit PE (1)ice pellets PE (2)Portable Executable (Micky$oft) PEM Privacy Enhanced Mail PEO-C3S Program Executive Office - Command, Control and Communications Systems PEO-IEWS Program Executive Office - Intelligence, Electronic Warfare and Sensors PEP Peak envelope power PER Packed Encoding Rules PERL Practical Extraction and Report Language, Unix scripting pers personnel PERSCOM Personnel command PEST Plasma Experiment Satellite Test pf Picofarad PF Pilot Flying PFC (1)Private, First Class PFC (2)Prepared Form Card, a homemade QSL for a station to sign PFRR Poker Flat Research Range, AK PGP Pretty Good Privacy, e-mail encryption program PHOTINT Photographic Intelligence (satellite pics, etc.) PHP PHP Hypertext Processor (a recursive acronym) PI protection interval PIC Programmable Interrupt Controller (computers) PIN Personal Identification Number pine Pine Is Nearly/Not/Not yet Elm, Unix mailer PING Packet InterNet Groper (ICMP "ping pong" tester for net) PIO (1)Public Information Officer PIO (2)Programmed Input/Output PIP Peripheral Interchange Program, old CP/M copy PIPEX Public IP EXchange (UK) PIREP Pilot Report, weather in standard form PIW Person(s) In Water PK WND peak wind PL (1)"Private Line," Motorola tradename for CTCSS PL (2)Pilot light PL/1 Programming Language 1 (computer code) PLB Personal Locator Beacon PLC Power Line Carrier (Power company LF control system) PLIP Parallel Line Internet Protocol PLL (1)Phase Locked Loop PLL (2)prescribed load list PLS CW brevity: Please PM (1)Phase Modulation, slightly resembles FM PM (2)Post Meridian, hours between noon and 11:59 local PM (3)Project Manager PMBO Participating Mailbox PMC Personnel management center PMCS Preventive maintenance checks and services PME Protective Multiple Earth (ground) PMFC Pacific Missile Firing Center PMO Provost Marshall's Office PMRS Private Mobile Radio Service PMSV Pilot-to-Metro Service PM-TRCS Project manager, tactical radio communication systems PN Pseudo-Noise PNA Philippines News Agency PNF Pilot Not Flying PNO precipitation amount not available PNP Positive/Negat ive/Positive; transistor type PO dust/sand whirls (dust devils) POB Persons On Board POC POCSAG POD POE POES POETS POL POL-ARQ POP POP POR PORTS POSIX POSIX POST pot POTS POTS POTS POTUS pp PP PPDL PPM PPM PPM PPM PPP PPPoE PPR PPTP

Point of Contact Post Office Code Standardization Advisory Group (paging) Point of debarkation Point of embarkation Polar Orbit Environmental Satellite Push Off Early - Tomorrow's Saturday Petroleum, oils, and lubricants Polish diplomatic ARQ teleprinter system (1)Post Office Protocol (Internet) (2)Point of presence Pacific Ocean Region (USCG) Physical Oceanographic Real-Time Systems OSI standard, like Unix Portable Operating System Interface Power-On Self Test Potentiometer [~] (1)Plain Old Telephone System (2)Plain Old Telephone Service (3)Purchase Of Telephone Service (US Government) President Of The United States Phone patch Transmission is in Portuguese Point to Point Data Link (1)portable pixmap (2)Page per minute (3)Parts per million (4)Pulse Position Modulation Point-to-Point Protocol Point-to-Point Protocol over Ethernet Prior Permission Required (military landing permit) Point-to-Point -Tunneling Protocol

PQM PR PR PR PRB PRB-1 PRB-1 PRC PRC prep PRESRR

path quality matrix (1)Puerto Rico (2)Person Reporting (police) partial Personal Radio Bureau (FCC) Personal Radio Bureau 1, FCC resolution attempting to preempt local radio laws Personal Radio Bureau-1 (FCC tower rule) (1)Pseudo-Rang e Correction (DGPS) (2)People's Republic of China preparation pressure rising rapidly

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PRFG PRM PRML PROM ProSEDS Prosign PRZ PS/2 PSA PSAP PSB PSDN PSE PSK PSK-31 PSL PSM PSO PSR PSRAM PSS PSS PSSN PST PSTN PSWAC PT PT PT PTC PTD PTO PTR PTR PTR PTT PTT PU pub PUP PVASI PVO PWINO PWM PWR PY Q Q QA QAM QCWA QLF QNH QoS QPC QPSK QRA QRCT QRG QRG QRH QRL QRL? QRL? QRM QRN QRO QRO QRP QRP QRP QRQ QRR QRRR QRS QRSS QRSS QRT QRT QRU QRU? QRV QRX QSA QSB QSD QSK QSL QSL QSO QST QST QSTAG QSV QSV? QSX QSY QSY QTC QTH QWD QWERTY QWZ R chks R R R R R R&D R&O R/T R/W R3E RA RA RA

partial fog Pulse rate modulation Partial Response Maximum Likelihood (HD transfer mode) Programmable Read Only Memory Propulsive Small Expendable Deployer System (NASA) Procedural Signal ("over," etc.) Polar Return to Zero Personal System 2, IBM's less-than-sensat ional replacement for the PC Public Service Announcement Public Safety Answering Point Personnel services battalion Public Switched Data Network CW brevity: Please Phase-shift keying Phase-shift keyed very narrowband simplex direct printing scheme Process Specification language Pulse step modulation Public service officer Primary Surveillance Radar Pseudo Static Random Access Memory, obsolescent (1)Personnel service support (2)Packet Switch Stream (British Telecom) pseudo sunspot number Pacific Standard Time, US Public Switched Telephone Network Public Safety Wireless Advisory Committee (1)Preparednes s, Training and Exercises Directorate (FEMA) (2)Patrol Torpedo (boat) (3)Permeabilit y Tuned Parallel Test Component (Linux) Pilot-to-dispatcher Permeability tuned oscillator (1)Primary Training Range (2)Puerto Rico (3)Pointer [~] (1)Push to talk (2)Post, Telegraph and Telephone administration (UK) ("Papa Uniform") participating unit publication Principal User Processor Pulsating Visual Approach Slope Indicator private volunteer organization precipitation identifier sensor not available Pulse width modulation Power spray HectoPascals (U.S. METAR variant) Quality (measure of selectivity in inductive circuits) Quality Assurance Quadrature Amplitude Modulation Quarter Century Wireless Association (amateur) Facetious prosign: Now send with your LEFT foot Set your altimeter to -- barometric pressure Quality of Service Question Pool Committee (amateur exams) Quaternary Phase Shift Keying The name of my station is -Quick Reaction Communications Terminal (1)Your frequency is -- kHz (2)The frequency is --, Kenneth Drift ("Your frequency varies...") I'm busy; frequency is in use (1)Are you busy? (2)Is this frequency in use? Interference Noise (1)High power operation (2)Please increase power (1)Low power operation (2)Please reduce power (3)Quick Reaction Package (US Army vehicle) Please increase code sending speed Old land distress call, now SOS, MAYDAY, or QRRR Old land distress call Please reduce transmission speed (1)VERY low speed CW ("super QRS") (2)Quasi-Rando m Signal Source (1)Station has ceased transmitting (2)Please cease transmitting I have no traffic for you Do you have traffic for me? I am ready (go with your traffic) Please standby Signal strength Fading Your keying is defective Duplex CW ("break-in") (1)A card or letter confirming reception of a radio station (2)Acknowledgm ent of transmission, a fancy "roger" Communications between two or more stations (1)General call: "Hello all amateurs" (2)Ham radio magazine published by ARRL Qadripartite Standardization Agreement Send Vs Should I send Vs? I am listening on... (1) Frequency change (2) Change frequency to -- kHz Message Location of station Quarterly World Days, observation intervals Name of standard typewriter keyboard, from top row of ltrs Facetious prosign: Are you woozy? I am woozy Radio checks (1)CW prosign: "Message received" (2)DC resistance (in ohms) (3)Resistor (4)Right (5)Runway Research & Development Report & Order (FCC) Receiver/Transmitter Rotary wing (helicopter) Single sideband, reduced carrier (usually 6 dB) radiotelephony (1)Radio Authority (UK) (2)Rain (3)Radio Australia

RA RAA RAAF RAC-ARQ RACES Racon RAD Radar RADARA RADAY RADIL

(4)File format: Real Royal Australian ArmyAudio Royal Australian Air Force ARQ mode propietary to Racal/Thales Radio Amateur Civil Emergency Service, FEMA affiliates Radar Beacon Radiological [~] Radio Detection And Ranging Regional And Domestic Air Route Area Radio Day (US Mil) ROCC/AWACS digital information link

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RADINT (1)Radar intelligence RADINT (2)Radiation intelligence RADIUS Remote Authentication Dial In Service RADM Rear Admiral RADMO Radio Mode RADSL Rate Adaptive Asymmetric Digital Subscriber Line RADSTA Radio Station RAF Royal Air Force RAG Replacement Air Group RAI Radio Televisione Italiana RAID (1)Redundant Array of Inexpensive Disks (servers) RAID (2)Rapid Assessment and Initial Detection team (FEMA/Army NG) RAIL Runway Alignment Indicator Lights RAM Random Access Memory (can be changed) RAMAC Random Access Method Of Accounting And Control (IBM, 1956) RAMDAC Random Access Memory Digital to Analog Converter RAMP Radar Modernization Project RAN Royal Australian Navy RAOC rear area operations center RAPCON Radar approach control RARP Reverse Address Resolution Protocol RASC Radio Atmospheric Science Center (Japan) RASP Radio Science And Propagation RATCF Radar Air Traffic Control Facility (USN) RATS Radio Amateur Telecommunicatio ns Society RATT Radioteletype (usually military 75/100 bd) RAV Restricted Availability RB Radar Beacon RBL Realtime Blackhole List (Internet) RBL Realtime Blackhole List (spam filtering) RBS Radar Bomb Scoring RC (1)Reserve Components (US Army) RC (2)Radio control RCA Radio Corporation of America RCC (1)Rescue Coordination Center (GMDSS) RCC (2)Range control center (USAF) RCC (3)Resource control complex RCC (4)Rag Chewer's Club (ham award) RCCC Range communications control center RCI Radio Canada International RCMA Dead scanner radio club, which included HF utility RCNC Range communications network controller RCNY Rules of the City of New York RCO Range Control Officer rcp Remote Copy (unix) RCP Resource Change Proposal RCR Runway Condition Reading RCS (1)Radio Communication System RCS (2)Reaction Control System (NASA) RCS (3)Radar cross-section RCS (4)Radio Conference Subcommittee (of IRAC) RCS (5)Remote Control System RCS Radio Conference Subcommittee rcv Receive mode rcvr receiver RD (1)replacement directorate RD (2)Restricted data RD (3)Regional Director RD Radar man (old USCG grade) RDARA Regional and Domestic Air Route Area RDEC Research, Development and Engineering Center (Army) RDF (1)Radio direction finding RDF (2)Resource Description Framework RDF (3)Resource Description Format RDF (4)Rapid Deployment Force RDF (5)Repeater Distribution Frame (telephony) RDF (6)Raw Data File RDF (7)Record Description Field RDM (1)Radio Data Modem RDM (2)Radio Diffusion Marocaine (Morroco) RDNS Reverse Domain Name System lookup (Internet) RDRAM RAMBUS (company) Dynamic Random Access Memory RDS Remote Data Service RDT Remote digital terminal RE Reverse engineering REACT Radio Emergency Associated Communication Team, like ARES, but on CB and GMRS REC Radio-electron ic combat rec receive recon reconnaissance REDHORSE Rapid Engineer Deployable Heavy Operational Repair Squadron, Engineer REE Radio Exterior de Espana (Spain overseas broadcaster) Reg regulation, includes radio rules REJ Packet control frame: Reject, data out of sequence Rem (1)Remark (computer programming) Rem (2)Radiation-e quivalent, man (nuclear safety) REP Radiological Emergency Preparedness (program) REQ request req'd required RETMA Radio, Electronics, Television Manufacturers Assn, now EIA retrans retransmission rev reverse RF Radio Frequency RF/EMPINT Radio Frequency/Electr omagnetic Pulse Intelligence RFC (1)RF Choke RFC (2)Request For Comment (Internet standards) RFDS Royal Flying Doctor Service (Australia) RFDU RF distribution unit RFE Radio Free Europe RFI (1)RF Interference RFI (2)Radio France International RFID Radio Frequency Identification RFP Request For Proposals RFPI Radio For Peace International, Costa Rica RFR RF radiation RG-# Radio Guide, Radio Group, Radio Grade (differs) - coax cable designator RGB Red, Green, Blue; additive color mixing like TV RGS Remote ground station RHC Radio Havana Cuba RHCP Right-hand circular polarization RHOJ Radar home on jam RI (1)Routing indicator (Telex or radiograms) RI (2)Ring Indicator (modem line) RIAA Recording Industry Assn of America (audio) RIFF Resource Interchange File Format (Microsoft MIDI) RIMM (1)RAMBUS In-Line Memory Module RIMM (2)Removable Interchangeable Media Module RIO (1)Radar Intercept Officer RIO (2)Relative Ionospheric Opacity Riometer Relative Ionospheric Opacity Meter (uses cosmic RF) RIPE Regional Internet Registry for Europe RIPE Reseaux IP Europeens (Internet registry) RISC Reduced Instruction Set Computing, chip architecture RIT Receiver Incremental Tuning, same as "clarifier" RITL Radio In The Loop (telephony) RJ Radio Japan RLC Resistance-Ind uctance-Capacita nce (network) Rlogin Remote Login, networking program like telnet RM (1)("Romeo Mike") Radioman, radio operator

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RM RM RMA RMA RMA RMA RMC RMI RMI RMI RMI RMK RMP RMP RMP RMP RMP RMS RMS RMS RMS RMS RMS RMTN RN RN RN RN RN rn RNR RNZ RNZAF RNZI RNZN RO RO ROA ROC ROC ROC ROCC ROE ROFL ROFOR Roger ROLAP ROM ROMPRES RON ROSE ROTATE ROTFL ROTHR ROTR ROVER RP RP RPA RPA RPC RPG RPI RPM rpm RPN rpt rpt Rptr RPU RQ RQ RQS RR RR RR RR RR RR RRC RRC RRP RRSS RRx RS RS RS RS RS RS RS RS RS RS RS-232 RSA RSA RSGB rsh RSN RSO RSOC RSS RSS RSS RSS RST RST RSTA RSVP RSVP RT RT RT RT RTB RTC

(2)Radio Man (old USCG grade, became TC) (3)File extension: Real Media (1)Revolution in Military Affairs (US tax subsidized paper crunching) (2)Return Merchandise Authorization (3)Reduced Major Axis) (4)Old Microsoft midi file format (see MIDI) Regional Meteorological Center (1)Radio Magnetic Indicator (2)Republic of the Marshall Islands (3)RIFF MIDI (an acronym made up of acronyms) (4)Radio Miami International Remarks (1)Radio Mobile Patrol (NYPD car) (2)Radio Motor Patrol (3)Radio Móvil Privada (Spanish: Private Mobile Radio) (4)Raster Map Product (5)Radio Merkury Poznan (Poland) (1)Royal Majesty Ship (2)Royal Mail Steamer (obsolete?) (3)Root Mean Square (4)Remote Mine Sweeping (5)Radar Manual Systems (6)Remote Manipulator System (space shuttle's robot arm) Region IV Meteorological Telecommunicatio n Network (1)Radio Netherlands (2)Royal Navy (3)Registered Nurse (4)Revision Notice Radio Netherlands Read News, usually the default Unix Usenet reader Packet control frame: Receive Not Ready Radio New Zealand Royal New Zealand Air Force Radio New Zealand International Royal New Zealand Navy Radio Officer (traditionally trained in Morse code) Receive Only Remotely Operated Aircraft (1)Regional Operating Center (FEMA/NCS) (2)Rear operations center (3)Reservoir Operating Center (USACE) Regional Operations Control Center Rules Of Engagement Rolling On Floor Laughing (Internet, also ROTFL) Route Forecast Voice Prosign: Message Received (from "R" in Morse code) relational on-line analytical processing (databases) Read Only Memory (can't easily be changed) Romanian press agency Remain Over Night (US military) RATS Open System Environment (Packet; see RATS) Radar Observations of Tornadoes And Thunderstorms Experiment Rolling On The Floor Laughing (Internet, also ROFL) Relocatable (HF) Over-The-Horizon Radar Receive-Only Typing Reperforator (tape printer) Remote Out-of-Vehicle Emergency Radio (LAPD) (1)Received Pronunciation (British radio "accent") (2)Reporting Party (Police) (1)Remote Passphrase Authentication (2)Radio-Progr amming Application Remote Procedure Call (lousy Windoze security) Report Program Generator (strange IBM computer language) Runway Point of Intercept Red (Hat) Package Manager (Linux) Rotations per minute Reverse Polish Notation (computing) (1) Reception report (2) CW prosign: repeat Repeater Remote Pickup Unit (1)Repeat Request (2)Request acknowledgment of receipt (DSC protocol) Request to send (modem handshaking line, rare name for RTS) (1)Transmissio n is in Russian (2)Radio Regulation (ITU) (3)Railroad (don't laugh, some use HF) (4)Packet control frame: Receive Ready (5)Response and Recovery Directorate (FEMA) (6)Radio Reloj (clock radio, SS news format) (1)Regional Radio Conference (ITU) (2)Range Rate Correction (DGPS) Runway Reference Point Radparker Relay Spam Stopper Routine Report, where x is a sequential letter, used for delayed METAR (01)radiated susceptibility (02)range squadron (03)reentry system (04)requiremen ts submission (05)resource scheduling (06)Radio Satellite (Russian amateur) (07)EIA Recommended Standard, RS-232 was one (08)Record Separator (ASCII) (09)Radio Sweden (10)Reference Station Recommended Standard 232, standard serial I/O, now EI-232 (1) Rivest-Shamir-Ad elman, inventors of a proprietary type of public-key encryption (2)Republic of South Africa Radio Society of Great Britain Restricted shell (Unix) Real Soon Now (when everything is going to happen) Range Safety Officer Regional SIGINT Operation Center (like Menwith, UK) (1)Really Simple Syndication (world wide web) (2)Radio Subsystem (3)RDF Site Summary (see RDF #2) (4)Rich Site Summary (1)Signal report: Readability, Strength, [Tone] (if CW) (2)Reset reconnaissance , surveillance and target acquisition (1)Resource Reservation Protocol (2)Repondez Si'Vous Plait (Please Respond, party invitations) (1)Radiotelephone (2)Receiver-transmitter (3)Receive Timing (4)routing table Return to base Rail Traffic Control

RTCA RTCE RTCM RTCP RTD RTDC RTE RTF RTF RTFM RTFMS

Radio Technical Commission for Aeronautics Reat-Time Channel Evaluation Radio Technical Commission for Maritime (services) Real Time Control Protocol Return to duty Real time data controller Radio Telefs Éireann (Ireland) (1)Radiodiffus ion Television Francais (2)Runtime file Read the [fine] manual Real-Time (HF) Frequency Management Software

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RTHK RTLS RTLS RTO RTO RTO RTOK RTOS RTS RTT RTT RTTY RTZ RVR RVRNO RWI RWR RWY RX RX RX RXD RXR RY RZ S S s s/n S/N S/NR s/off s/on s/w S&TCD S1 S2 S3 S3A S4 SA SA SA SA SAA SAAF SAAFR SABC SABM SAC SACCS SACD SACEUR SACLANT SAE SAFE SAGE SAID SALS SAM SAM SAM SAMCOM SAME SANA SAO SAO SAP SAP SAP SAR SAR SAR SARAH SAREX SARNET SARSAT SART SART SARTG SASE SAT SAT SAT SATAN SATCOM SATERN SAVASI SAWS SB SB SB SBA SBA S-band SBCS SBD SBD1 SBE SC SC-104 SCA SCA SCADA SCAMP SCAT SCCS SCDCC SCDX SCDXC SCI SCMA SCN SCN SCO SCO SCO

Radio Television Hong Kong (1)Return to launch site (2)Real-Time Locating Systems (1)Responsible Test Organization (US) (2)Radioteleph one Operator (LAPD) (3)Range training officer Retest OK Real Time Operating System Request To Send (secondary handshaking modem line) (1)Radioteletype (2)Radio Transmission Technology Radioteletype Return To Zero Runway Visual Range RVR system not available radio wire integration (changed to NRI-net radio interface) Radar Warning Receiver runway (1)Receiver (2)Religious programming (3)Retransmission Received Data (Serial I/O) Receive Reversed (usually RTTY Mark/Space) RYRYRY teleprinter test call Return to Zero (1)south (2)Siemen second Serial number Signal/Noise ratio Signal/Noise Ratio Sign off Sign on software (computer programs and instructions) Space and Terrestrial Communications Directorate Adjutant (US Army) Intelligence Officer (US Army) Operations and Training Officer (US Army) Supervised Standard Scientific Analysis Supply Officer (US Army) (1)South Atlantic (2)Sand (3)Situational Awareness (4)Selective Activation (GPS) South Atlantic Anomaly, a large magnetic deviation Small Austere Air Field Standard use Army Aircraft Flight Route South African Broadcasting Corporation Packet control frame: Set Async Balanced Mode (connect) Strategic Air Command, now part of US Stratcom Strategic Automated Command & Control System Super Audio Compact Disk (Sony/Philips) Supreme Allied Command(er) Europe Supreme Allied Commander, Atlantic {NATO} Self Addressed Envelope (usually with IRC or "green stamp") Selected Area For Evasion Semi-Automated Ground Environment (early, huge, USAF system) Sub-Auroral Ion Drift Short Approach Lighting System (1)Special Air Mission (US Air Force VIP flight) (2)South America (MWARA) (3)Surface-to- Air missile Special Air Missions Communications ("Mystic Star") Specific Area Message Encoding (US weather warnings) Syrian Arab News Agency (1)South Atlantic Ocean (2)Surface Aviation Observation (weather) (1)Second Audio Program (2)Special-Acc ess Program (3)Soon As Possible, when every radio project has to be done (1)Search and rescue (2)Synthetic Aperture Radar (3)Station Availability Report (SHARES) Standard Automated Remote to Autodin Host Shuttle Amateur Radio Experiment NOAA SARSAT Network Search And Rescue Satellite (1) Survival Craft Radar Transponder (2) Search And Rescue Transponder Scandinavian Amateur Radio Teleprinter Group Self Addressed Stamped Envelope (1)South Atlantic (MWARA) (2)Satellite (3)Saturday Security Administrator Tool for Analyzing Networks Satellite communication Salvation Army Team Emergency Radio Network Simplified Abbreviated Visual Approach Slope Indicator Stand Alone Weather System (1)Standby (EIA-449) (2)Sierra Bravo, son of a [female dog] (3)Sideband (1)Sovereign Base Area (2)Small Business Administration 1.55-5.2 Ghz microwave band Single Byte Character Set Safe Braking Distance (railroad) Safe Braking Distance + 1 minute (also SBD2, etc) Society of Broadcast Engineers Sudden commencement (of a magnetic storm; causes fadeouts) Special Committee #104 (DGPS Standard) (1)Subsidiary Communications Authorization (US commercial FM) (2)Shuttle Carrier Aircraft (NASA's modified 747 for transporting orbiter) Supervisory Control and Data Acquisition System Single-Channel Antijam Man-Portable Strategic Communications (Continuing) Assessment Program satellite communications control system Southern California Digital Communications Council (Amateur) Sweden Calling DXers Southern California DX Club San Clemente Island (USN, CA) Southern California Monitoring Association (1)System Coordination Net (US Coast Guard) (2)SHARES Coordination Net (US NCS/SHARES) (1)Subcarrier oscillator (2)Santa Cruz Organization, a software source (3)State Coordinating Officer (FEMA/NSEP)

SCOPE SCPC SCPT SCR SCRAM SCRRBA SCS SCSI SCSL SCT SDF

System Capable Of Planned Expansion (Scope Command) Single channel per carrier Single channel per transponder Silicon controlled rectifier Scramble; automated fast shutdown of nuclear reactor [~] Southern California Repeater/Remote Base Assn (Amateur) Satellite Control Squadron Small Computer System Interface ("scuzzy") stratocumulus standing lenticular cloud Scattered clouds Simplified Directional Facility

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SDH Synchronous Digital Hierarchy SDI Strategic Defense Initiative, U.S. space money sink SDLC Synchronous Data Link Control, bitwise computer comm protocol SDLP Station Data Link Protocol SDNRIU Secure Digital Net Radio Interface Unit SDR Software Defined Radio SDRAM Synchronous Dynamic Random Access Memory SDSL Symmetric Digital Subscriber Line SDU Secure data unit SDX Semi-duplex SE Southeast SEA Southeast Asia (MWARA) SEAD Suppression of Enemy Air Defenses SEAL Sea, Air, Land (US Navy special op teams) SEAM Space Emergency Action Message SEATO South East Asia Treaty Organization (now ASEAN) sec Second SEC Software Engineering Center (Army) SECAF Secretary of the Air Force SECAM (1)SEquentiel Couleur A Memoire, weird French TV standard, adopted by Russian bloc to keep out Western TV SECAM (2)Simply Everything Contrary to America SECDEF Secretary of Defense (US) SECT SHARES Emergency Coordination Team SECURE State Emergency Capability Using Radio Effectively SECURITE Prosign: safety traffic follows; uses FF pronunciation SEE-CURE-EE-TAY SEDENA Secretaria de la Defensa Nacional (Mexico) SEE Stimulated Electromagnetic Emissions SELCAL Selective Calling (tones or numbers) [~] SELFEC Selective FEC SELSCAN Proprietary name for Collins scanning ALE HF radio system SENS System Event Notification Service (Windows) SENSAPI System Event Notification Service API (nested acronym) SENSE Synthetic Environments for National Security Estimates SEP Solar Energetic Particle Event (observation interval) SES Ship Earth Station SESC Space Environmental Services Center SESEF Ship Electronic Systems Evaluation Facility (US Navy) SETI Search for Extra-Terrestrial Intelligence (by radio) SEVOCOM Secure voice communications SEW Space & Electronic Warfare SF Special Facility SFA Single Frequency Approach SFC surface SFCG Space Frequency Coordination Group SFDU Standard formatted data unit SFF Small Form Factor (hard disks) SFU Solar flux unit SG Signal ground SG snow grains SGIN Subgroup Identification Number (FCC) SGML (1)Standard Generalised Markup Language SGML (2)Standard Generalized Markup Language SGRAM Synchronous Graphic Random Access Memory SGT Sergeant SH (Rain) Showers sh Bourne Shell, originally the Unix default command interpreter SHA-1 Secure Hash Algorithm-1, US code SHAEF Supreme Headquarters, Allied Expeditionary Forces SHAPE Supreme Headquarters, Allied Powers, Europe SHARES SHAred RESources, part of US Federal NCS SHF super high frequency SHIFOR Stastical Hurricane Intensity FORecast SHIPS Stastical Hurricane Intensity Prediction Scheme SHOALS Scanning Hydrographic Operational Airborne LIDAR Survey SHTTP Secure Hypertext Transfer Protocol (web) SI (1)Systeme Internationale d'Unites; a standard unit system SI (2)Shift In (Baudot & ASCII) SIC (1)Service Identification Code SIC (2)Standard Industrial Classifification SIC (3)Standards Implementation Committee SIC (4)Specific Inductive Capacity SID Sudden Ionospheric Disturbance (solar flare effect) SIG (1)Signature [~] SIG (2)Special Interest Group SIGCEN signal center [~] SIGINT Signals Intelligence [~] SIGMET Significant Meteorological warning signals [~] SILENCE MAYDAY Voice prosign: frequency is on standby for distress traffic; uses FF pronunciation SEE-LONCE MAY-DAY SIMM Single In-line Memory Module SIMMS Single In-line Modular Memory System SIMOP Simultaneous Operation (of radios; an interference standard) Simul Simulcast SINAD signal-plus-no ise-plus-distort ion to noise-plus-dist ortion ratio SINCGARS Single-Channel Ground/Airborne Radio System SINPFEMO Signal report: adds modulation and propagation details SINPO Signal report: adds Noise, Propagation to SIO SINS Ship's Inertial Navigation System SIO (1)Signal report: Strength, Interference, Overall (1-5) SIO (2)Serial Input/Output SIOP Single Integrated Operational Plan SIOPS Special Intelligence Operations SIPRNET Secret IP Router Network (military's own Internet w/NIPRNET) SIR Subsurface Interface Radar SIRTF Space Infrared Telescope Facility (NASA) SIS (1)Secret Intelligence Service (aka MI6, UK) SIS (2)Scramble Information Service (Dutch planespotter network) SITFAA Inter-American Air Forces Telecommunications Network (Spanish) SITOR (1) Simplex Teleprinting Over Radio SITOR (2) Simplex Telex Over Radio SITOR-A Simplex teleprinting over radio system, mode A (ARQ) SITOR-B Simplex teleprinting over radio system, mode B (FEC) SITREP Situation report SITSTAT Situation status SIU Server Interface Unit SJA Staff judge advocate SK CW prosign: "End of transmission," usually written VA SKC Sky clear SKYWARN NWS/ARRL amateur severe weather spotting network SLAM Standoff Land Attack Missile SLB Single Letter Beacon (Russian Navy marker xmsn) SLBM Sea-Launched Ballistic Missile SLC Space Launch Complex SLEP Service Life Extension Program SLHFB Single-Letter High-Frequency beacon (see SLB) SLIP Serial-Line Internet Protocol, older than PPP SLOC Sea lines of communication SLOSH Sea, Lake, and Overland Surges for Hurricanes SLP (1)Seaward Launch Point SLP (2)sea-level pressure SLPNO sea-level pressure not available SLR Shielded Loop Receiver SLS Space Launch Squadron SM Statute Miles SMART (1)Self Monitoring Analysis and Reporting Technology SMART (2)Self-Manage d Arrival Resequencing Tool SMART (3)Segmented Method for Analytical Ray-Tracing SMART-T Secure Mobile Antijam Reliable Tactical Terminal SMASH Synchronous Multi-channel Access Signalling for HF

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SMB Server Message Block (Windows) SMC Space and Missile Center SMEX Small Explorer (Goddard/NASA) SMF Special Message Field SMMW Sub-millimeter wave SMRS Specialized Mobile Radio System SMS Short Message Service (text) SMSI Sommet Mondial sur la Société de l'Information SMT Surface mount technology SMTP Simple Mail Transfer Protocol (Internet) SN (1)Serial number SN (2)Snow SNA System Network Architecture SNAFU Situation Normal All [Fouled] Up SNINCR snow increasing rapidly SNMP Simple Network Management Protocol, computers SNR Signal to Noise Ratio SNSM Société Nationale de Sauvetage en Mer (French National Society for Ocean Rescue) SO DIMM Small Outline Dual Inline Memory Module SO (1)Sheriff's Office SO (2)Shift Out (ASCII) SOA School Of the Americas (now WHISC) SOAP Simple Object Access Protocol (Internet) SOAR Special Operations Air Regiment SOB Souls On Board, number of people on an aircraft SOCOM Special Operations Command (US Navy) SODIMM Small Outline Dual In-line Memory Module SOF (1)Special Operations Forces SOF (2)Safety Of Flight SOH Start Of Heading (ASCII) SOHFRAD Special Operations High Frequency Radio SOHO (1)Solar Heliospheric Observatory (satellite at Lagrange point) SOHO (2)Small Office/Home Office (computing) SOI (1)Signal of interest SOI (2)Signal operation instructions SOI (3)Space Object Identification (NORAD) SOIR Simultaneous Operations on Intersecting Runways SOJ Small Outline J-lead SOL [Spit] Out of Luck SOLAS Safety Of Life At Sea (series of international treaties) Sonar Sound detection & ranging SONET Bell spec for data transmission over optical fiber SONGS San Onofre Nuclear Generating Station SOP Standing/Stand ard operating procedure SOPS Space Operations Squadron SOS Morse distress call, sent as one long character, replaced CQD [~] SOSB special operations support battalion SOSEC Surveillance Observation Satellite Evaluation Center SOSEX SOSUS Exercise SOSS (1)Sound Search Stations SOSS (2)Soviet Ocean Surveillance System SOSUS (1)Sound Surveillance Underwater System; network of hydrophones across Bering Straight to listen for Russian subs SOTDMA Self-Organizin g Time Division Multiple Access SOUTHCOM Southern Command SOW (1)Start Of Watch SOW (2)Statement Of Work SP (1)South Pacific (MWARA) SP (2)Silent Period (500 kHz CW watch, obsolete) SP (3)Shore Patrol (US Navy MPs) SP (4)Space (RTTY) SPAC Spectrum Planning and Policy Advisory Committee SPACECOM US Space Command SPAR (1)Special Air Resources, US Air Force VIP flight SPAR (2)Seagoing Platform for Acoustic Research SPC Storm Prediction Center (NOAA) SPDT Single-Pole, Double-Throw SPDU HFDL: Squitter Protocol Data Unit SPE Satellite Proton Event; solar-terrestri al disturbance SPECI (1)Aviation Selected Special Weather Report, from French SPECI (2)an unscheduled report taken when certain criteria have been met SPEEDX Society for the Preservation of the Engrossing Enjoyment of DXing. I believe that an old "bug" key had this tradename as well. SPF Shortest Path First SPI (1)Service Provider Interface SPI (2)Stateful Packet Inspection SPINCOM Special Intelligence Communications Spkr Speaker SPL Sound Pressure Level SPL/1 High-Order Signal Processing Language #1 SPO Security, plans, and operations SPOD Seaport of debarkation SPS (1)Spectrum Planning Subcommittee (of IRAC) SPS (2)Standard Positioning Service SPS (3)Service Propulsion System (Apollo project) SPSS Space Surveillance Squadron SPST Single-Pole, Single-Throw Spt Support SPTT Security Policy Translation Table SPX Sequenced Packet Exchange SQ squalls sqdn Squadron SQL Structured Query Language (computer databases) SQPSK Staggered Quadrature Phase Shift Keying (like OQPSK) SR Special Reconnaissance (SR-71 "Blackbird") SRA Specialized repair activity SRAM Static Random Access Memory SRB Solid-Rocket Booster(s), NASA Space Shuttle, recovered by BRV SRMS Smart Resource Management System SRWBR Short Range Wide Band Radio SS (1)Transmissio n is in Spanish SS (2)Sandstorm SS (3)Shifting Standards (computer marketing technique) SS (4)Steam Ship SSA Supply support activity SSB Single Sideband SSC Sudden Storm Commencement (geophysics) SSD Satellite Services Division (NOAA) SSE South-southeast SSE-CMM Systems Security Engineering-Capability Maturity Model SSEC Selective Sequence Electronic Calculator (IBM, 1948) SSF Southern Straits of Florida SSG The Space Systems Group ssh Secure Shell (Unix) SSI Server Side Includes (web) SSI Space Science Institute SSID (1)Secondary Station Identifier (packet) SSID (2)Service Set Identifier (wireless networking) SSL Secure Sockets Layer (encrypted TCP/IP computer networking) SSN (1) Sunspot Number SSN (2) Nuclear Submarine (US Navy) SSN Social Security Number (same as TIN - FCC forms) SSOM Spanish language numbers transmission, male voice SSPAR Solid State Power Amplifier-Recei ver SSR (1)Secondary Surveillance Radar SSR (2)Soviet Socialist Republic (obsolete) SSR/IFF Secondary Surveillance Radar/Identification Friend or Foe SSRAM Synchronous Static Random Access Memory SSRC Single Sideband, Reduced Carrier SSSC Single Sideband, Suppressed Carrier

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SST (1)Supersonic Transport (aircraft) SST (2)Sea Surface Temperature SSTV Slow Scan Television SSW South-southwest SSYL Spanish language numbers transmission, female voice ST Send Timing (EIA-449) STA (1)Status (packet) STA (2)Special Temporary Authority (from FCC, to do something) STAJ Short Term Anti-Jam (makes gurgling noise on-air) STAMIS Standard Army Management Information System STANAG Standardizatio n Agreement (NATO) [~] STAR SHARES Transportable Auxiliary Radio STARC State Area Command (Army NG) STARS (1)Space-based Telemetry And Range Safety STARS (2)Secure Tactical Army Radio System STARS (3)Standard Terminal Automation Replacement System STARS-V Secure Tactical Army Radio System-VHF STAT Old CP/M status command, replaced in version 3.0 STCICS Strike Command Integrated Communications System (RAF) STD (1)Standard STD (2)Solar-Terre strial Dispatch, Canadian auroral warning center STG Satellite Tracking Group STK Strike Control sTLD Sponsored Top Level Domain (.aero, .coop, etc) Stn Station STP Shielded Twisted Pair (cable) STPD standard temperature, pressure, dry STRATCOM U.S. Strategic Command STS Space Transport System, the "Space Shuttle" STSA Standard Telemedicine System Architecture STT Shore Targeting Terminal STU Secure Telephone Unit STU-III Secure Telephone Unit, Third Generation STX Start Of Text (ASCII) SUA/ISE Special Use Airspace/Inflight Situational Enhancement SUB Substitute (ASCII) SUNA Sudan News Agency SUO Small Unit Operations SuperDARN Super Dual Auroral Radar Network suppl supplement SURFnet Dutch academic network SUV Sport-Utility Vehicle svcs services SV-CW-C Greek Telegraphy Club, aka GTC SVP (1)Single Line Variety Package (telco) SVP (2)Si Vous Plait ("If you please" in French) SVT (1)Sveriges Television (Swiss TV network) SVT (2)Secure Voice Terminal SW (1)Shortwave (high frequency - HF) SW (2)Southwest SWBC Short Wave Broadcasting SWED-ARQ Swedish ARQ teleprinter system, used by that country SWF Short Wave Fadeout (ionospheric disturbance) SWI Special World Interval, unscheduled radio astronomy observation period caused by solar event SWL Shortwave Listener SWR (1)Standing Wave Ratio SWR (2)Surface-Wav e Radar SWS Standard Workstation (US Coast Guard) SX (1) Simplex SX (2) Old Hallicrafters prefix, usually meant radio had xtal filter SYMPA Systeme de Multi-Postage Automatique (French mailing list program) SYN Synchronous Idle SYNOP Synoptic weather reports (from surface observations) Sysop System Operator, the king on a BBS T (1)US Coast Guard C3 office, DC; aka G-T T (2)Boston transit system t Time (in seconds) T/R Transmit/Recei ve switching T1 Relatively high speed data connection over phone line T2FD Terminated, Tilted, Folded Dipole tac tactical TAC Tactical Air Command, now ACC TAC Technical Advisory Committee TACACS Terminal Access Controller Access Control System TACAMO Take Charge And Move Out (US Navy CP aircraft) TACAN Tactical Air Navigation TACC (1)Tanker/Airl ift Command Center (US AMC) TACC (2)Tactical Aircraft Control Center (US) TACFIRE Tactical fire direction system TACS Terminal Access Conversion Service (UK) TACS Traffic Alert and Collision Avoidance System TACSAT Tactical satellite TACSATCOM tactical satellite communications TACT Tailored Annual Cutter Training (USCG) TACTS Tactical Aircrew Combat Training System TAD Temporary Additional Duty TADIL Tactical Digital Information Link (US) TAF Terminal Aerodrome Forecast, aviation weather TAFB Tropical Analysis and Forecast Branch (TPC) TAI International Atomic Time TAL Transoceanic Abort Landing (space shuttle) TALCE Tanker Air Lift Control Element TANJUG Old Yugoslav news agency TAO Tactical Action Officer TAOC Tactical Air Operations Center TAP Telocator Alphanumeric Protocol (paging) TAPR Tuscon (AR) Amateur Packet Radio, ham software source tar Tape Archive, Unix backup/archive program TARBS Television and Radio Broadcasting Services (Australia) TARPS Tactical Airborne Reconnaisance Pod System TARPS-DI TARPS Digital Imagery TAS True Air Speed TASMA Two-meter Area Spectrum Management Assn. (Amateur) TAW Tactical airlift wing TAWC Tactical Air Warfare Center TBA To Be Announced TBD To Be Determined TC Telecommunicat ions Specialist (old USCG grade, was RM) TCAS Traffic (Alert) & Collision Avoidance System TCC Telecommunicat ions center TCF Tactical combat force TCH Threshold Crossing Height TCM Trellis Coded Modulation TCN Track Condition Notice (railroad) TCP Transmission Control Protocol TCP/IP Transmission Control Protocol/Intern et Protocol TCPA Time to Closest Point of Approach TCPOD Tropical Cyclone Plan Of the Day TCS (1)Tactical Control System TCS (2)Tactical Camera System TCU Towering Cumulus TCWF Terminal Convective Weather Forecast TD (1)Transmitted Data, short for TXD TD (2)Transmitter /Distributor (old RTTY) TD (3)Tropical Depression TDA Table of distribution and allowances TDD Time Delay Distortion TDM Time-Division Multiplex

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TDMA Time Division Multiple Access TDOA Time Difference Of Arrival TDP Takeoff Decision Point TDU Threat Display Unit TDY Temporary duty ("to go TDY") TEC Total Electron Content (of ionospheric region) TECG Tactical Exercise Control Group TEI Text Encoding Initiative Telco Telephone Company ("The phone company") Telcom Telephone communication TELCOR Telecommunicat ions Operating Requirements (USN) Telecom Telecommunication Teletext Short text messages, usually in TV blank interval TELINST Telecommunications Instructions Telnet Internet or dialup protocol for remote login TEMPEST Telecommunications Electronics Material Protected from Extraneous Spurious Transmissions (secure enclosure for computers, etc.; prevents eave TEMPO Temporary weather change TERPES Technical Electronic Processing and Evaluation System TESTM Metar Test Message TEXN Traffic Exchange Network (MARS) Tfc Traffic tfc Traffic TFE Tactical field exchange TFEO Tactical field exchange officer TFN Till Further Notice TFR Temporary Flight Restriction TFT (1)Thin Film Transistor TFT (2)Task Force Terminal TFW Tactical Fighter Wing THAAD Theater High Altitude Area Defense THD Total Harmonic Distortion (audio, in %) THFRS Transformation High-Frequency Radio System THREATCON Threat Condition (Alpha, Bravo...) TIA (1)Telecommuni cation Industry Association (UK) TIA (2)Thanks in advance TIA (3)The Internet Adaptor, clever SLIP emulator from dialup shell TIBS (1)Tactical Information Broadcast System TIBS (2)Telephone Information Briefing Service TIDLS Tactical Information Data Link System TIFF Tagged Image File Format, versatile computer graphic standard TIGER Topologically Integrated Geographic Encoding and Referencing TIM Time Intermodulation distortion (audio) TIN Taxpayer Identification Number (same as SSN - FCC forms) TIP Threat Image Projection TIS (1)Traveler's Information Station TIS (2)Trusted Information System TIS (3)This Is (ALE) TISCOM Telecom & Information Systems Command, VA (USCG) TKAP Transmitter Keep-Alive Program TLA Three-Letter Acronym (NASAspeak for NASAspeak) TLD Top Level Domain (.com, .org. .net, etc) TMC (1)Technical Materiel Corporation, out of business TMC (2)TeleMonteCa rlo, Monaco TMDE Test, measurement, and diagnostic equipment TMMMC Theater medical materiel management center tms Teams TN ("Tango November") Track number (ASW) TN3270 Telnet for IBM mainframes, emulates old 3270 terminal TNC (1)Terminal Node Controller (packet) TNC (2)Threaded Neill-Concelman (connector) TNC (3)Threaded Navy Connector (alternate) TOA Time Of Arrival TOC Tactical Operations Center TOD (1)time of day TOD (2)Tactical Ocean Data TOD (3)Target Offset Distance TOD (4)Takeoff Distance TODS TFR Operations Display System (see TFR) TOE (1)Table(s) of organization and equipment TOE (2)Theory of everything (physics) TOR Teleprinting (or Telex) over Radio TOW (1)Tube-launch ed Optically-tracke d Wire-guided missile TOW (2)Terminal orderwire TOW (3)Time Of Week (see GPS) TOW (4)Takeoff Weight TPC Tropical Prediction Center, Miami, FL TPFDD Time-phased force and deployment data tpi Turns per inch T-Plex 8-frequency duplex ARQ teleprinter system TPM Technical Protection Measures TPO Transmitter power output TPR Third-Party Relay TPRAM Triple Port RAM TR Transmit-Receive TRACAB Terminal RAdar control in the tower CAB TRACE Transition Region And Coronal Explorer (NASA) TRACON Terminal Radar Approach Control TRADOC United States Army Training and Doctrine Command trans Transportation TRANSCOM Transportation Command TRC (1)Tactical Radio Communication TRC (2)Transmissio n Release Code TRI-TAC Joint Tactical Communications trmt Treatment TRSA Terminal Radar Service Area TRT Tropical RadioTelegraph, once owned by United Fruit Co TRUEX Training in Urban Environment Exercise (USMC) TS (1)thunderstorm TS (2)Tropical Storm TSA Transportation Security Administration TSB Technical Support Branch (TPC) TSC (1)Tactical Service Center (US Navy) TSC (2)TRICARE Service Center (US Navy medical) TSC (3)Terrorist Screening Center TSC (4)Technical Subcommittee (of IRAC) TSC (5)Training Systems Contract TSC (6)Training Support Center TSCC (1)Tactical Surveillance Control Center (US Navy) TSCC (2)Transportat ion Security Control Center (TSA) TSCC (3)Trauma Symptom Checklist for Children TSCC (4)Telemetry Standards Control Committee TSCC (5)Telemeterin g Standards Coordination Committee TSCC (6)Tracking Signal Corrections Counter TSCM Technical surveillance countermeasures (antibugging) TSGT Technical Sergeant TSNO thunderstorm information not available TSOP Thin Small Outline Package TSP (1)Telecommuni cations Support Plan (NCS) TSP (2)Telecommuni cations Service Priority (NCS) TSR Terminate and Stay Resident (IBM programming) TSSR Tropospheric Scatter (TROPO)-Satelli te Support Radio TTL (1)Transistor- Transistor Logic TTL (2)Time To Live (of Internet packets or DNS records) TTL (3)Talk To ya Later TTL (4)Through The Lens TTP Trusted Third Party (for authentication of public keys) TTT CW prefix: Distress call follows TTWCS Tactical Tomahawk Weapon Control System

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TTY Teletype TTYL Talk (Type) To You Later (Internet) TU (1)CW brevity: Thank you TU (2)Terminal unit (old current-loop RTTY) TUBA TCP and UDP with Bigger Addresses (possible Internet extension) TV Television TVA Tennessee Valley Authority (big dam operator) TVC Televisió de Catalunya (Catelan TV, Barcelona) TVI Television interference TVNZ Television New Zealand TWA (1)Trailing-wi re antenna (USN ELF/Tacamo) TWA (2)Tilt Whip Adaptor (US Army) TWA (3)Trans World Airways TWAIN (1)Toolkit Without An Important Name (Standard graphic scanner interface) TWAIN (2)Technology Without An Interesting Name TWAS This Was (ALE) TWEB Transcribed Weather Broadcast Twinplex Four-frequency duplex teleprinter system TWR (1)tower TWR (2)Trans World Radio TWT Traveling Wave Tube TWX Teletype Wide-area eXchange tx Transmitter, talk TXD Transmitted Data (Serial I/O modem line) txt (1)Extension: file is unformatted ASCII text (computers) txt (2)Text U CW brevity code: "You" U Up U/L (1) Uplink U/L (2) Upload UA (1)Packet control frame: Unnumbered Acknowledgement UA (2)User Agent (Internet) uA Microamp UART Universal Asynchronous Receiver/Transmi tter (computer) U-ATA Ultra-AT Attachment UAV Unmanned Aerial Vehicle (USAF) UCVE Unconfined Vapor Cloud Explosion UDP User Datagram Protocol, type of Internet packet good for streaming UDRE User Differential Range Error (GPS) UDT (1)Universal Dataflow and Telecommunicati ons UDT (2)Underwater Demolition Team, crack USN WWII unit UEJ Unattended Expendable Jammer uf Microfarad UFN Until Further Notice UFO (1)Unidentifie d Flying Object UFO (2)UHF Follow On, new Navy COMSAT UGR Unitized group ration UHF Ultra High Frequency (300-3000 MHz) UI (1)User Interface UI (2)Packet designator: Unnumbered Information UI (3)User Initiated UID User Identification UIDL User Initiated Download UIN Universal Internet Number (ICQ) UK United Kingdom UKADGE UK Air Defense Ground Environment UKCC United Kingdom Control Center UKMACCS United Kingdom Maritime Coastal Communications System UKMET United Kingdom Office of Meteorology (also a model) UKNET UK network for UUCP UKSOF UK Satellite operations facility, part of NATO UL (1)Upload UL (2)Unauthorize d launch UL (3)Underwriter s' Laboratories ULS Universal Licensing System (FCC) UMT Unit ministry team UMTS Universal Mobile Telecommunicatio ns System UN United Nations UNB Universal Magnetic Balun uncl unclassified UNCLASS Message is not classified [~] UNCLOS United Nations Convention on the Law of the Sea UNF (1) UN Forces UNF (2) Unformatted UNHCR UN High Commission for Refugees UNI User Network Interface Unid Unidentified Uniden Unidentified UNIFIL UN Interim Forces, Lebanon Univac Universal Automatic Computer, once IBM's main competition Unix Not an acronym; computer op-system derived from MULTICS [~] Unk Unknown UNO United Nations Organization UNPROFOR UN Provisional Forces UNSCOM UN Special Commission (Iraq inspectors) UP (1)CW prosign: "change to working frequency" UP (2)unknown precipitation UPNP Universal Plug aNd Play UPS (1)Uninterrupt ible Power Supply UPS (2)United Parcel Service UR CW brevity code: "Your" URE Unión de Radioaficionados Españoles Ureq User request (computer return code) URL Universal Resource Locator (World Wide Web) URSI International Union of Radio Science URSIGRAM Coded solar-terrestria l report, originally from URSI US (1)United States US (2)Unit Separator (ASCII) USA (1)United States of America USA (2)US Army USA (3)Underground Service Alert ("dial before you dig") USA (4)Unit self-assessmen t USACE US Army Corps of Engineers USADA US Department of the Army USAF US Air Force USAFA US Air Force Academy USAFAWC US Air Force Air Warfare Center USAFE US Air Forces, Europe USAIS US Army Intelligence and Security Command, VA USAMMA US Army Medical Materiel Agency USAR (1)Urban Search & Rescue USAR (2)US Army Reserve USAREUR US Army, Europe USARSPACE US Army Space Command, part of USSPACECOM USART Universal Synchronous/Asy nchronous Receiver/Trans mitter USASC US Army Signal Command USASCH US Army Support Command Hawaii USASDC U.S. Army Strategic Defense Command, now USASSDC USASI US Army Space Institute USASSDC US Army Space and Strategic Defense Command, formerly USASDC USAV US Army Vessel USAWC US Army War College USB (1)Upper Sideband USB (2)Universal Serial Bus USC (1)United States Codes (Federal statute law) USC (2)Unified Space Command, now USSPACECOM USC (3)Up S[pit] Creek USCENTCOM US Central Command

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USCG US Coast Guard USCGA US Coast Guard Auxiliary USCGC US Coast Guard Cutter USCGR US Coast Guard Reserve USCS US Customs Service USCSIS United States Space Command Space Intelligence System USD US Dollars USDA US Department of Agriculture USELMNORAD US element, North American Aerospace Defense Command USENET "User Network," huge volunteer organization that propagates "News," not necessarily over Internet USEUCOM US European Command USFJ US Forces, Japan USFS US Forest Service USFWS US Fish and Wildlife Service USG (1)US Gallons (about 4 liters) USG (2)US Government USGS (1)US Coast & Geodetic Survey USGS (2)US Geological Survey USIA US Information Agency USKA Union Schweizerischer Kurzwellen-Amateu re (Swiss ham assn) USLANTCOM US Atlantic Command USM US Marshal USMA US Military Academy USMC US Marine Corps USMCR US Marine Corps Reserve USMS US Marshals Service USMTF United States Message Text Format USN US Navy USNA US Naval Academy USNG US National Guard USNO US Naval Observatory USNR (1) US Naval Reserve USNR (2) US Navy, Retired USNS US Naval Ship USO United Service Organizations USOS Unshift On Space USP University of the South Pacific (Fiji, classes by radio) USPACOM United States Pacific Command USPHS United States Public Health Service USPS (1)United States Postal Service USPS (2)US Power Squadrons USR (1)User USR (2)US Robotics (modem mfgr) USS United States Ship USSOCOM US Special Operations Command USSOUTHCOM U.S. Southern Command USSPACECOM U.S. Space Command USSS United States Secret Service USSTRATCOM U.S. Strategic Command USTA United States Total Army USTRANSCOM United States Transportation Command USVI US Virgin Islands UT (UT0 - UT3) Universal Time scales (corrected constantly) UTB Utility Boat UTC (1)Universal Time, Co-ordinated (corrected with leap sec.) UTC (2)Coordinated Universal Time uTLD Unsponsored Top Level Domain (.biz, etc) UTP Unshielded Twisted Pair (hardwired networks) UUCP Unix-to-Unix Copy Program (Unix file transfer s/w) Uudecode Unix program, converts uuencoded files back to binaries Uuencode Unix program, converts binary files to ASCII for transfer uuf Micro-microfar ad, now pf (picofarad) uV Microvolt UV Ultraviolet uW Microwatt UWB Ultra Wideband UWC Universal Wireless Communications consortium UXB Unexploded Bomb UXO Unexploded Ordnance V (1)Voltage (electromotive force) V (2)Variable V (3)Verification v Velocity VA (1) CW prosign: "End of transmission" VA (2) Volt-amps (as in a power supply) VA (3) Veteran's Administration VA volcanic ash VAAA Voice Activated Auto Attendant (telco) VAAT Voice Activated Audio Text (telco) VAB Vehicle Assembly Building (NASA) VABP Voice Activated Blue Pages (telco) VAC Volts Alternating Current VAD Voice-Activate d Dialing (telco) VADM Vice-Admiral VAFB Vandenberg Air Force Base (CA) VAIVR Voice Activated Interactive Voice Response (telco) VAL Visiting Aircraft Line VANC Voice-Activate d Network Control (telco) VAPD Voice Activated Premier Dialing (telco) VAS VOLMET Automation System VASI Visual Approach Slope Indicator VAX (1)Variable Address Extension (old DEC Computer) VAX (2)English vacuum cleaner brand : ) VAX/VMS VAX Virtual Memory System, op-system for above VBI Vertical Blanking Interval (TV) vBNS Very high speed Backbone service (US) VBR Variable Bit Rate VBS Visual Basic Scripting (Microsoft security nightmare) VC in the vicinity Vcc Collector voltage VDC Volts Direct Current VDE Video Display Editor, at one time standard freeware CP/M & PC text editor VDL VHF Data Link (ARINC) VDLM2 VDL, Mode 2 VDLC Virtual Data Link Capability VDSL Very high-data-rate Digital Subscriber Line VDSL Very-high-bit- rate Digital Subscriber Line VDT Video Display Terminal VDU Video Display Unit VE Volunteer Examiner (Amateur) VEC Volunteer Examiner Coordinator (Amateur) VENONA Old US codeword for its USSR decryption program 1943-1980 [~] VESA Video Equipment Standards Association, computer displays VESREP Standard report from commercial fishing vessel VF (1)Voice frequency VF (2)Velocity Factor VF (3)Fighter squadron (USN) VFAT Virtual File Allocation Table (MS-Windows) VFO Variable Frequency Oscillator VFR Visual Flight Rules VFT Voice Frequency Telegraph (multiplex RTTY) VHF Very High Frequency (30-300 MHz) vi Visual Editor, full-screen text editor for Unix VICS Vehicle Information Communication System VIN Vehicle Identification Number VIP Very Important Person VIS visibility VISNO visibility at secondary location not available

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VLB VESA Local Bus; PC display bus, now usually done by the PCI VLF Very Low Frequency (3-30 kHz) VLM Virtual Loadable Module (Novell) VM (1)Voice mirror VM (2)Virtual memory VMC Visual Meteorological Conditions VMS Virtual Memory System, good but obsolete DEC OS VNA Viet Nam News Agency Vne Absolute top speed of an aircraft; "never exceed" VOA Voice Of America Vocoder Voice coder VOH Voice Of Hope (KVOH, religious broadcaster) VOIP Voice Over Internet Protocol VOLMET Flight weather transmission, for planes in route Volt Unit of electrical potential, named for Alessandro Volta VOM Volt-Ohm Meter VOMUX Voice Multiplexer VOR (1)VHF Omnidirectional Ranging (Aircraft NAVAID) VOR (2)Voice Of Russia VORTAC Ground station combining VOR and TACAN VOX Voice operated switching VPF Vertical Processing Facility (NASA) VR (1)Voltage regulator VR (2)Visual Route (air training route) VRAM Video RAM VRB Variable wind VRC (1)Vehicular Radio Communications (AN/VRC-xxx) VRC (2)Vehicular radio configuration (Army) VRC (3)Vertical Redundancy Check, fancy name for parity (computers) VRML Virtual Reality Modeling Language VROC Vertical rate of climb VRT Vlaamse Radio- en Televiseomroep (Belgian) VSAT Very Small Aperture (Antenna) Terminal VSC Vertical Service Code (telco features - start with *) VSFC Virginia Space Flight Center, Wallops Island vsh Visual Shell, clunky full-screen command interpreter for Unix VSWR Voltage standing wave ratio VT (1)Vertical Tab (ASCII) VT (2)Valid Time (wx forecasts) VTnnn Series of old DEC terminals, still a popular emulation code VTP Virtual Terminal Protocol VTS Vessel Traffic Services VTVM Vacuum-tube voltmeter VU Volume Units VUFER VHF/UHF Frequency Experimental Radio VV Vertical Visibility (of obscured sky) VVV CW test group VWS Virtual Warning System VxD Virtual Device Driver (MS-Windows) VXO Variable Crystal Oscillator VY CW brevity code: "Very" W Power, in watts W west W Whisky ("Benchmark Whisky" is USN offset) W3C World Wide Web Consortium WA (1)CW prosign: word after WA (2)Work Authority (railroad orders) WABNRES Worldwide Airborne Resources (command a/c) WAC (1)Worked All Continents (amateur award) WAC (2)Women's Army Corps, obsolete WAC (3)World Aeronautical Chart WAD Wide-Area Domain (computer games) WAFS World Area Forecast System, satellite delivered air wx WAGB USCG designation for icebreaker WAIS Wide-Area Information Server WAMS Wide Area Master Station WAN (1)Wide-Area Network WAN (2)Wide-Area Network Station WAP (1)Wireless Application Protocol WAP (2)Wireless Access Point WARC World Administrative Radio Conference WARN Weather Amateur Radio Network, see SKYWARN WARP Weather and Radar Processor WAS (1)Wide-Area Surveillance WAS (2)Worked All States (US amateur award) WAS/MTI Wide Area Surveillance/Moving Target Identification WATS Wide Area Telephone Service WAZ Worked All Zones (amateur award) WB (1)Wideband WB (2)CW prosign: word before WB (3)Welcome Back (Internet) WB (4)Warner Bros (Good movie studio, lousy TV network) WBFM Wideband frequency modulation WBU World Broadcasting Unions WBU-ISOG WBU Inter-Union Satellite Operations Group WBU-TC World Broadcasting Unions Training Centers WCRP (1)World Climate Research Program WCS (1)Wireless Communications Service WCS (2)Waste Collection System (Space shuttle potty) WDC World Data Center, any of several for solar-terrestr ial obs W-DCMA Wideband Code Division Multiple Access WE Western Electric WEFAX Weather Facsimile WEMA Work Equipment Movement Authority (railroad orders) WEMF World Electronic Media Forum WEP Wired Equivalent Privacy (wireless computer LANs) WFAS Wildland Fire Assessment System (USFS) WFM Wideband FM WFN War Fighter Net WFO Weather Forecast Office WG Working Group (ITU) WG/SO Working Group for Surface Observations WGI World Geophysical Interval (research observation period) WHCA White House Communications Agency WHEC High-Endurance Cutter (USCG) WHISC Western Hemisphere Institute for Security Cooperation (see SOA) whoami Returns name you are logged in under (Unix) [~] whois Internet lookup program for finding people by querying servers [~] WIE With Immediate Effect WIFCOM Wirefree communications (US Navy) Wi-Fi Wireless Fidelity, 802.11 standard interface; originally 802.11b Wilco Voice prosign: Will comply WIMP (1) Window, Icon, Mouse, Pointer (graphical interface) WIMP (2) Weakly Interacting Massive Particle WINS Windows Internet Naming Service WINSOCK Windows Sockets API, used for networking from Microsoft s/w WISE Web-Integrated Software metrics Environment WIU Wayside Interface Unit (railroad) WIX USCG designation for training barque Eagle Wkg Working WL Wordlength, size of basic data group (computing) WLAN Wireless Local Area Network (computing) WLB Seagoing Buoy Tender (USCG) WLI Inland Buoy Tender (USCG) WLIC Inland Construction Tender (USCG) WLIS We Love Interval Signals (Pirate) WLL wireless local loop WLM Coastal Buoy Tender (Medium Endurance USCG vessel)

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WLR River Buoy Tender (USCG) WMD (1)Weapons of Mass Destruction WMD (2)Weapons of Mass Distraction (psyops tongue-in-cheek) WMD-CST Weapons of Mass Destruction Civil Support Team WMEC Medium-Enduran ce Cutter (USCG) WMO World Meteorological Organization WMR World Music Radio WMSCR Weather Message Switching Center Replacement WMTS Wireless Medical Telemetry Service WMV Windows Media Video WND wind WNW West-northwest WO Work order WORM Write-Once Read-Many (CD-R, allows making own CD-ROMs) WPA Wi-Fi Protected Access WPB Patrol Boat (USCG) WPM Words per minute WRAPA Work Restricted Authority/Prot ect Against (railroad orders) WRC World Radio (Communications) Conference WRCC Western Regional Climate Center (NOAA) WRTH World Radio TV Handbook WRU Who Are You? (RTTY) WSHFT wind shift WSL Weapons Survivability Lab WSM Weapon system manager WSMR White Sands Missile Range (NM) WSO Weapon Systems Officer ("Whizzo") WSRO Weapon system replacement operations WST Weather Station WSTF White Sands Test Facility (NM) WSW West-southwest WT (1)Walkie-talkie WT (2)Wireless Telegraph (Morse or RTTY) WTB (1)Wireless Telecommunicatio ns Bureau (FCC) WTB (2)Want To Buy (radio swap ads) WTDD Wayside Train Defect Detector (hotbox/dragger detector) WTGB 140' Icebreaking Tug (USCG) WTLD Wayside Train Length Detector WTMD Walk-Through Metal Detector WU Western Union WUAN Wireless Universe Area Network WUN World Utility News, Internet group, maintains large e-mail list, rhymes with "one" WVDC Working Voltage, DC (capacitors) WW Weather Warning WWABNCPP Worldwide Airborne National Command Post Program WWCR (1)World Wide Christian Radio (callsign) WWCR (2)World Wide Conspiracy Radio (facetious) WWMCCS Worldwide Military Command and Control System, obsolescent WWNWS World Wide Navigational Warning Service WWRB World Wide Religious Broadcasters (callsign) WWV NIST standard frequency & time station, Boulder, CO WWVB NIST Boulder, CO, low frequency standard broadcast WWVH NIST standard frequency & time station, Kekaha, HI WWVL Old NBS low-frequency time stn, no longer on air WWW World Wide Web, aka W3, www, Web, World Wide Wait Wx Weather WYFR We're Your Family Radio (Callsign) WYSIWYG What You See Is What You Get (computers) X (1) Reactance, in ohms X (2)(Also "Xray") prosign for end of sentence XAML eXtensible Application Markup Language (mickeysoft) X-band (1)8-12 GHz microwave band X-band (2)Expanded AM band, 1610-1720 kHz XCHS Extended Cylinder, Head, Sector (addressing) xcvr Transceiver xfmr Transformer XINU XINU Is Not UNIX (recursive and retrograde) xistor Transistor xmit Transmit mode XML eXtensible Markup Language xmlns XML namespace XMODEM Async file transfer protocol, uses 128-byte or 1K packets, over direct links, not Internet XMS Expanded Memory System (IBM PC, different spec from EMS) xmsn Transmission xmt Transmit mode xmtr Transmitter XO Executive officer Xon/Xoff Computer serial flow control, usually using DC3/DC1 (^S/^Q) xponder Transponder XSD XML Schema Definitions (see XML) XSL eXtensible Style Language XSS (1)Cross Site Scripting (Computer security) XSS (2)eXperimenta l Satellite System (USAF) XSS (3)eXtremely Simple Syndication (news feed) XSS (4)Callsign for new UK/NATO ALE system [~] XT eXtra Value (PC-XT was first IBM PC with a hard disk; obsolete) xtal Crystal XTP eXpress Transfer Protocol (computers) XUL (1)XML User-interface Language XUL (2)eXtensible User-interface Language X-windows Standard windowing system for networks (usually Unix) [~] XXX (1)CW prefix: traffic is urgent (same as SECURITE) [~] XXX (2)Set of standards for X.25 PAD packet networking XYL Wife ("ex-young lady") Y2K Year 2000, or resulting computer bugs (geekspeak) YAHOO Yet Another Heirarchical Officious Oracle; may be a back-formation, as guys who started Yahoo! styled themselves as just yahoos YB Yacht Boy (Grundig radio line) YF CW brevity code: "Wife," more typically "XYL" YL Female voice ("Young Lady") YLE Yleisradio (Finland, not an acronym) YMMV Your Mileage May Vary (cardinal rule of HF) YMODEM Along with YMODEM-G, improved async file transfer protocol [~] Z (1)Zulu time, standard time on 0 meridian, like UT Z (2)Impedance (in ohms) Z (3)This message has FLASH precedence Z-80 Early 8-bit processor chip, used by CP/M, still made Z-Count 29-bit binary GPS time stamp (17 LSBs are broadcast) ZAA Z-code: You have improper circuit discipline ZAE Z-code: I am unable to receive you ZAN Z-code: We have absolutely negative copy ZBI UK Military Z-code: Switch to voice mode ZBO Z-code: (INT ZBO Do you have traffic (of precedence...) for me?) I have traffic (of precedence...) for you ZBR Z-code: Break for retuning ZBZ Z-code: (INT ZBZ: What is my signal's printing acceptability? (1-5) ) Your signal's printing acceptability is (1-5) ZCP Z-code: I have poor conditions; please use full power ZCPR3 Small Z-80 operating system, improved on CP/M, obsolete ZDE Z-code: Message undelivered ZDF Z-code: Message delivered ZEN Military Z-code: Message has been copied to... ZFD Military Z-code: Message may be a duplicate ZFG Military Z-code: Message is a duplicate and is to be forwarded ZKI Z-code: Listen [on _ kHz] ZKR Z-code: I have a radio watch on _ kHz ZNC Z-code: I have no communication with _  ZNG Z-code: Band conditions no good for copy ZNI Z-code: No station ID heard ZNJ Military Z-code: Message has been sent to... ZNK Military Z-code: Addressees who do not hold cryptographic facilities are exempted

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ZNR Military Z-code: Msg may be forwarded without change by radio or non-approved circuit ZNR UUUUU Security Warning Signal: Message is Unclassified or offline encrypted - OK to forward unchanged on any circuit ZNX You have disclosed an EEFI (1-10; see EEFI) ZNY Military Z-code: Do not forward this message unencrypted by radio or non-approved circuit. ZNY RRRRR Security Warning Signal: Message is RESTRICTED ZNY CCCCC Security Warning Signal: Message is CONFIDENTIAL ZNY SSSSS Security Warning Signal: Message is SECRET ZNY TTTTT Security Warning Signal: Message is TOP SECRET ZRF Zero Retention Force ZRO Z-code: How copy? ZSR Z-code: You are strong-readabl e ZUC Z-code: Unable to comply until ---ZUH Z-code: Unable to comply ZUT (1)Unofficial Z-code: "CW Forever!" (see CW) ZUT (2)Zeta Upsilon Tau, 60s US Coast Guard radio op society ZWEI ZWEI Was EINE Initially (recursive acronym; see EINE) ZWR Z-code: You are weak-readable ° degrees ? wavelength µ micro µµF micro-microfar ad, now pF µH microhenry µV microvolt ? ohms ? angle theta

Police/CB 10-codes: 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-10 10-19 10-20 10-21 10-22 10-23 10-27 10-28 10-33 10-97 10-98 10-99

Your signals are being received poorly Your signals are loud & clear Stop transmitting Your message is received ("Roger;" saying both is redundant) Please relay Station is busy Out of service, radio off In service, available Please repeat message Out of service, radio on Go back to station/HQ Location ("What's your 20?") Use landline/phone Cancel message Stand by Driver's license ID check Vehicle registration check ("Rolling 28" -CHP) All units stand by, frequency is on emergency status I am arriving at assignment/ on scene ("I'm 97") Assignment completed/ leaving scene Emergency; equivalent to SOS and MAYDAY

Other police codes: Code Code Code Code Code Code Code Code Code Code Code Code Code Code Code Code Code Code Code Code

1 Come in on the radio 2 Respond quickly, without lights/siren ("hurry") 2A Hurry faster - call is priority 3 Respond with lights/siren 4 No more help needed, situation stable 4A No more help needed, suspect still not in custody 5 Stakeout at (--), uniformed patrol stay away 6 Out of vehicle, on investigation 7 Out t to o lun lunch ch 10 Request clear frequency 20 Notify news media 30 Alarm 30A Alarm with audible suspects inside 33 Emergency, all units stand by 37 Vehicle is stolen (LAPD) Alpha Assemble at prearranged staging point (LAPD) Blue (1)Notify police Blue (2)Respiratory emergency (medical) Red (1)Notify fire department Red (2)Frequency is restricted (LAPD Metro)

(your cops might be a bit different) Computer networking standards: IEEE 1394

"Firewire" high speed data transfer

56Kflex Telephone modem 56K, falling back in 2K increments from there. 802 802.3 802.3ab 802.3u 802.3z 802.11 802.11 802.11a 802.11b 802.11g 802.12

Family of IEEE recommendations for computer networks Ethernet, fast packet transfers, resembles wired radio Hot-rod Ethernet, one billion bits/sec over long copper Provides auto-speed, autoselection of duplex Hot-rod Ethernet, one billion bits/sec over fiber or twinax Draft standard for wireless Ethernet Original system; 1-2 Mbps using spread spectrum 2.4 GHz 54 Mbps via 5-GHz orthogonal FDM 11 Mbps in 2.4 GHz spread spectrum (Wi-Fi) 20+ Mbps in 2.4 GHz SS Recommendation for 100BaseVG/ 100VG/ AnyLAN

10Base-2 10Base-5 10Base-F 10Base-T 1000Base 1000Base-CX 1000Base-LX 1000Base-SX 1000Base-T 100Base-T 100Base-T4 100Base-TX 100Base-VG 100Base-X 100VG-AnyLAN ATM AAL AAL-1 AAL-2 AAL-3/4 AAL-5

Asynchronous Transfer Mode ATM Adaptation Layer Synchronous adaptation layer designed for carrying voice trunk lines Adaptation layer intended for variable bit rate video, but never really got off the ground and is not offered by vendors Adaptation layer intended to be used by Frame Relay and SMDS and other delay-insensitive variable rate or bursty data traffic, but mostly now 'Simple and efficient adaptation layer' for computer networking

Bell 103 Bell 212A T1

IEEE 802.3 thin ethernet (high-speed computer networking) IEEE 802.3 thick ethernet IEEE 802.3 ethernet over fibre-optic cable IEEE 802.3 ethernet over twisted pair cabling Gigabit ethernet standards Short-haul over copper 1300nm multimode and single-mode fiber according to 802.3z 850nm multimode fiber according to 802.3z Long-haul over copper according to 802.3ab IEEE 802.3 fast ethernet at 100Mbit/s Encoded 100Mbit/s over 4 pairs, obsolescent encoded 100Mbit/s over 2 pairs see 100VG-AnyLAN Encoded 100Mbit/s 100Mb/s LAN carrying Ethernet or Token-Ring, obsolescent

300 bps FSK (US modem tones, see V.21) 1200 bps (US modem tones, see V.22)

Relatively high speed data connection over phone line

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V.nn Prefix for CCITT specs - these are for phone modems V.17 Fax modem spec, to 14400 bps V.21 aka "Bell 103," the old 300 bps modem spec, makes sound like RTTY V.22 aka "Bell 212A," 1200 bps modem spec, slight differences V.22bis Above spec extended to 2400 bps V.23 1200/75 bps modem spec V.24 data link spec - equiv RS232 V.25bis modem control sequence for international calls, lost out to Hayes V.26bis 2400bps half duplex synchronous, used for fax V.27ter 4800bps half duplex synchronous, used for fax V.28 Data link spec V.32 9600/4800bps V.32bis 14.4K/12K/9600/7200/4800bps V.32 terbo (V.32 bis ter) proprietary modem spec for 19,200 V.34 33.6K/31.2K/28 .8K/26.4K/24K/19 .2K/16.8K/14.4Kbp s, then like V.32 V.42 LAPM error control, 1200bps and above V.42bis Data compression, 1200bps and above V.90 56Kb, falls back like 56Kflex V.FC V.Fast Class: unofficial, 19.2Kbps X.nn X.PC

ITU-T (formerly CCITT) recommendations: Async version of X.25 for small computers

X.10 X.21 X.21bis X.25 X.27 X.28 X.29 X.3 X.31 X.400 X.413 X.419 X.420 X.435 X.441 X.500 X.509

Proprietary device control by signalling over AC balanced data signalling standard, 15 wires Above, for 25 wires, unbalanced Packet communication protocols (AX.25 is amateur 37-pin data interface, adding handshake and flow Standard interface, terminal to PAD Control packet standard for PAD and remote host, PAD standard Network security protocol E-mail protocol Definition of message storage and forwarding Defines P3 and P7 protocols Defines interpersonal e-mail Defines control messages Defines voice messages Directory standard Digital security and identification

 

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lines radio) control using X.25

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